Name: Pentax K-3 Mark III
Brand: Pentax

Technical Specifications of Pentax K-3 Mark III

Overall score

7.9

Hide

Popularity

What it is: An indicator based on the number of reviews received by the camera.

When it matters: When you want to see which cameras attract the most buyer attention and review activity.

Sensor & Image

8.3

Hide

Sensor size

What it is: The sensor format value describes the physical light-collecting area.

When it matters: When you shoot in more difficult lighting.

Importance: HIGH

Good value: Full frame or larger

Main camera megapixels

What it is: The effective resolution of the camera sensor, measured in megapixels (MP). A higher resolution can capture more detail.

When it matters: When you want high-resolution photos that allow more cropping or larger prints.

Importance: HIGH

Good value: At least 20 MP

Main camera pixel size

What it is: The physical size of individual pixels on the camera sensor, measured in micrometers. Larger pixels typically capture more light for better low-light performance.

When it matters: When you shoot in low light and want reduced noise in your photos.

Importance: HIGH

Good value: At least 3.5 µm

Base ISO

What it is: The native ISO setting that delivers the sensor’s standard balance of image quality and dynamic range.

When it matters: When you want the best native image quality and compare cameras at their most optimal sensitivity setting.

Importance: LOW

Max ISO

What it is: The ISO ceiling shows the highest sensor sensitivity available for darker scenes.

When it matters: When you shoot in more difficult lighting.

Importance: MEDIUM

Good value: At least ISO 25,600

Photo Features

8.0

Hide

Lens mount

What it is: The mechanical and electronic interface that determines which interchangeable lenses the camera can use.

When it matters: When lens availability, upgrade options, and long-term system compatibility are central to your buying decision.

Importance: LOW

Pentax KAF2

Built-in focus motor

What it is: Indicates whether the camera body includes an internal autofocus motor for driving compatible lenses.

When it matters: When you plan to use older or budget lenses that depend on the camera body for autofocus drive.

Importance: LOW

N. of focus points

What it is: The total number of selectable autofocus points available for positioning and tracking focus.

When it matters: When you want more flexibility in placing focus precisely or tracking subjects across the frame.

Importance: HIGH

Good value: At least 200 points

Phase-detection autofocus (photos)

What it is: Autofocus technology that measures phase differences to lock focus quickly and accurately for still photography.

When it matters: When you want faster and more reliable autofocus for still photos, especially with moving subjects.

Importance: HIGH

AF tracking

What it is: An autofocus mode that continuously follows a moving subject to keep it sharp during shooting.

When it matters: When your subjects move unpredictably and you need the camera to keep focus on them automatically.

Importance: MEDIUM

Video & Audio

7.5

Hide

Max video resolution

What it is: The highest video resolution the camera can record, defining the maximum level of captured image detail.

When it matters: When you care about recording the highest level of detail for cropping, editing, or future-proof video work.

Importance: HIGH

Good value: At least 3840 px

Video bitrate

What it is: The amount of video data recorded per second, which affects file size and potential recording quality.

When it matters: When you compare potential video quality and want fewer compression artifacts in demanding scenes.

Importance: MEDIUM

Good value: At least 200 Mbps

Video bit depth

What it is: The number of bits used per color channel in recorded video, affecting gradation smoothness and editing flexibility.

When it matters: When you color grade video and want smoother gradients with fewer banding issues.

Importance: MEDIUM

Good value: At least 10-bit

Video chroma subsampling

What it is: The color sampling format used in video recording, indicating how much color detail is retained relative to brightness detail.

When it matters: When color grading, keying, or serious post-production work is important in your video workflow.

Importance: LOW

Video codecs

What it is: The video compression formats the camera can use when recording, affecting compatibility, efficiency, and workflow.

When it matters: When compatibility, editing performance, and file efficiency matter in the way you handle video.

Importance: LOW

H.264

Display & Design

6.1

Hide

Type

What it is: The camera type identifies the overall design, such as mirrorless, DSLR, compact, or bridge.

When it matters: When you want a camera style that matches how you shoot, carry, and swap lenses.

Importance: LOW

dslr

Weight

What it is: The total weight of the camera body, which affects comfort while carrying and shooting.

When it matters: When you carry the camera all day, travel often, or prefer a lighter setup.

Importance: MEDIUM

Good value: 500 g or less

Width

What it is: The width of the camera body, measured from side to side.

When it matters: When compact packing, grip comfort, or bag fit matters to you.

Importance: LOW

Height

What it is: The height of the camera body, measured from top to bottom.

When it matters: When you care about how compact the camera feels in a bag or in hand.

Importance: LOW

Thickness

What it is: The depth of the device profile, excluding the camera bump unless specified.

When it matters: When you prefer a sleek, slim profile that slides easily into tight pockets.

Importance: LOW

Battery & Power

Hide

Battery life (CIPA)

What it is: The official battery endurance estimate measured under CIPA test methodology, usually expressed in shots per charge.

When it matters: When you need realistic expectations for how many shots you can take before carrying a spare battery.

Importance: MEDIUM

Good value: At least 400 shots

Battery capacity

What it is: The amount of electric charge the battery can hold, measured in milliampere-hours (mAh).

When it matters: When you want a general idea of how large the battery is physically.

Importance: LOW

Good value: At least 1,500 mAh

Removable battery

What it is: Indicates whether the camera battery can be removed and replaced by the user.

When it matters: When you want to swap batteries quickly during a long shoot or replace an aging battery.

Importance: LOW

USB Power Delivery (PD)

What it is: Support for the USB Power Delivery standard for higher-power charging or external power supply over USB-C.

When it matters: When you want faster USB-C charging or the ability to power the camera externally for longer sessions.

Importance: LOW

Connectivity & Storage

8.7

Hide

Wi-Fi connectivity

What it is: Indicates whether the camera has built-in Wi-Fi for image transfer, remote control, or network features.

When it matters: When you want to transfer photos wirelessly, control the camera from a phone, or use supported network workflows.

Importance: LOW

Wi-Fi version

What it is: The specific generation of Wi-Fi standards supported (e.g., Wi-Fi 6, Wi-Fi 7), determining maximum speed and efficiency.

When it matters: When you have a high-speed router and want faster downloads with less congestion.

Importance: LOW

Bluetooth connectivity

What it is: Indicates whether the camera supports Bluetooth for pairing, remote control, or file transfer.

When it matters: When you want quick wireless pairing with a phone, remote control, or location syncing.

Importance: LOW

Bluetooth version

What it is: The Bluetooth version supported by the camera for wireless pairing and low-power connections.

When it matters: When you want more efficient wireless pairing, better range, or newer Bluetooth features.

Importance: LOW

USB Type-C

What it is: A modern, reversible connector used for charging, data transfer, and sometimes audio or video output.

When it matters: When you want a reversible cable that handles charging, data, and accessories universally.

Importance: LOW

Pentax K-3 Mark III vs the average camera

Why is Pentax K-3 Mark III better than the average camera?

Hide

1593600 ISO higher maximum sensitivity limit
Pentax K-3 Mark III has a higher max ISO than the average camera (1600000 ISO vs 6400 ISO). The average camera reaches a max ISO of 6400 ISO.
What it is: The ISO ceiling shows the highest sensor sensitivity available for darker scenes.
When it matters: When you shoot in more difficult lighting.
Importance: MEDIUM
Good value: At least ISO 25,600
Pentax K-3 Mark III has a higher max ISO than the average camera (1600000 ISO vs 6400 ISO). The average camera reaches a max ISO of 6400 ISO.1600000 ISO vs 6400 ISO
In-body stabilization
Pentax K-3 Mark III supports in-body stabilization, the average camera does not.
5-axis in-body stabilization.
What it is: A stabilization system that physically moves the image sensor to reduce shake during handheld shooting.
When it matters: When you often shoot handheld and want sharper results at slower shutter speeds without relying only on lens stabilization.
Importance: MEDIUM
Pentax K-3 Mark III supports in-body stabilization, the average camera does not.
Phase-detect AF for photos
Pentax K-3 Mark III supports phase-detection autofocus for photos, the average camera does not.
What it is: Autofocus technology that measures phase differences to lock focus quickly and accurately for still photography.
When it matters: When you want faster and more reliable autofocus for still photos, especially with moving subjects.
Importance: HIGH
Pentax K-3 Mark III supports phase-detection autofocus for photos, the average camera does not.
6.3 fps faster mechanical burst
Pentax K-3 Mark III has a faster mechanical burst rate than the average camera (12 fps vs 5.7 fps). The average camera shoots at 5.7 fps.
What it is: The maximum burst rate the camera can achieve using its mechanical shutter, measured in frames per second.
When it matters: When you photograph sports, wildlife, or action and want more chances to catch the exact moment.
Importance: MEDIUM
Good value: At least 10 fps
Pentax K-3 Mark III has a faster mechanical burst rate than the average camera (12 fps vs 5.7 fps). The average camera shoots at 5.7 fps.12 fps vs 5.7 fps
Human eye AF
Pentax K-3 Mark III supports human eye-detection AF, the average camera does not.
What it is: Autofocus detection designed to identify and prioritize human eyes for portrait and action shooting.
When it matters: When you shoot portraits, weddings, or events and want the camera to prioritize people’s eyes automatically.
Importance: LOW
Pentax K-3 Mark III supports human eye-detection AF, the average camera does not.
9.53 MP higher sensor resolution
Pentax K-3 Mark III has a higher sensor resolution than the average camera (25.7 MP vs 16.2 MP). The average camera has a sensor resolution of 16.2 MP.
What it is: The effective resolution of the camera sensor, measured in megapixels (MP). A higher resolution can capture more detail.
When it matters: When you want high-resolution photos that allow more cropping or larger prints.
Importance: HIGH
Good value: At least 20 MP
Pentax K-3 Mark III has a higher sensor resolution than the average camera (25.7 MP vs 16.2 MP). The average camera has a sensor resolution of 16.2 MP.25.73 MP vs 16.2 MP
Dual card slots
Pentax K-3 Mark III offers dual card slots, the average camera does not. 13.3% of cameras offer them.
What it is: Indicates whether the camera offers two memory card slots for backup, overflow, or file separation.
When it matters: When you want backup recording, overflow capacity, or separate file handling for more demanding shoots.
Importance: LOW
Pentax K-3 Mark III offers dual card slots, the average camera does not. 13.3% of cameras offer them.
470 shots more shots per charge
Pentax K-3 Mark III has longer battery life than the average camera (800 shots vs 330 shots). The average camera delivers 330 shots per charge.
What it is: The official battery endurance estimate measured under CIPA test methodology, usually expressed in shots per charge.
When it matters: When you need realistic expectations for how many shots you can take before carrying a spare battery.
Importance: MEDIUM
Good value: At least 400 shots
Pentax K-3 Mark III has longer battery life than the average camera (800 shots vs 330 shots). The average camera delivers 330 shots per charge.800 shots vs 330 shots
0.2 in larger screen diagonal
Pentax K-3 Mark III has a larger screen than the average camera (3.2 in vs 3 in). The average camera has a screen size of 3 in.
Has a touchscreen
Pentax K-3 Mark III has a touchscreen, the average camera does not. 36.6% of cameras support touchscreen input.
10 more customizable buttons
Pentax K-3 Mark III has more customizable buttons than the average camera (10 vs 0). The average camera offers 0 customizable buttons.
Better viewfinder type
Pentax K-3 Mark III uses a more advanced viewfinder than the average camera (optical vs none).
34.6% higher magnification
Pentax K-3 Mark III has a higher viewfinder magnification than the average camera (1.1x vs 0.78x). The average camera has a viewfinder magnification of 0.78x.
1593600 ISO higher maximum sensitivity limit
Pentax K-3 Mark III has a higher max ISO than the average camera (1600000 ISO vs 6400 ISO). The average camera reaches a max ISO of 6400 ISO.
9.53 MP higher sensor resolution
Pentax K-3 Mark III has a higher sensor resolution than the average camera (25.7 MP vs 16.2 MP). The average camera has a sensor resolution of 16.2 MP.
Uses a BSI sensor
Pentax K-3 Mark III uses a BSI sensor, the average camera does not. 34.8% of cameras use a BSI sensor.
Sensor cleaning system
Pentax K-3 Mark III includes a sensor cleaning system, the average camera does not.
8 newer
Pentax K-3 Mark III is newer than the average camera (2021 vs 2013). The average camera was released in 2013.
0.42 µm larger sensor pixels
Pentax K-3 Mark III has larger sensor pixels than the average camera (3.8 µm vs 3.34 µm). The average sensor pixel size is 3.34 µm.
In-body stabilization
Pentax K-3 Mark III supports in-body stabilization, the average camera does not.
Phase-detect AF for photos
Pentax K-3 Mark III supports phase-detection autofocus for photos, the average camera does not.
6.3 fps faster mechanical burst
Pentax K-3 Mark III has a faster mechanical burst rate than the average camera (12 fps vs 5.7 fps). The average camera shoots at 5.7 fps.
Human eye AF
Pentax K-3 Mark III supports human eye-detection AF, the average camera does not.
1.5 stops higher CIPA stabilization rating
Pentax K-3 Mark III has a higher CIPA stabilization rating than the average camera (5.5 stops vs 4 stops). The average camera has a CIPA stabilization rating of 4 stops.
1170 s longer maximum exposure
Pentax K-3 Mark III supports a longer maximum exposure than the average camera (1200 s vs 30 s). The average camera supports a longest shutter speed of 30 s.
Built-in AF motor
Pentax K-3 Mark III has a built-in focus motor, the average camera does not.
200000 more shutter cycles
Pentax K-3 Mark III has a higher shutter durability than the average camera (300000 vs 100000). The average camera is rated for 100000 shutter cycles.
Lossless compressed RAW
Pentax K-3 Mark III supports lossless compressed RAW, while the average camera does not.
Supports touch autofocus
Pentax K-3 Mark III supports touch autofocus, the average camera does not. 34.9% of cameras support touch autofocus.
18 more AF points
Pentax K-3 Mark III has more focus points than the average camera (41 vs 23). The average camera offers 23 focus points.
Includes headphone output
Pentax K-3 Mark III includes a headphone output, the average camera does not.
Has microphone input
Pentax K-3 Mark III has microphone input, the average camera does not.
Supports slow-motion video
Pentax K-3 Mark III supports slow-motion video, the average camera does not.
1920 px higher video resolution
Pentax K-3 Mark III records higher-resolution video than the average camera (3840 px vs 1920 px). The average camera records at 1920 px.
70 Mbps higher video bitrate
Pentax K-3 Mark III has a higher video bitrate than the average camera (100 Mbps vs 30 Mbps). The average camera records at 30 Mbps.
Clean HDMI output
Pentax K-3 Mark III offers clean HDMI output, the average camera does not.
Supports live streaming
Pentax K-3 Mark III supports live streaming, the average camera does not.
Built-in timelapse
Pentax K-3 Mark III includes timelapse capture, the average camera does not.
Supports 24p cinema mode
Pentax K-3 Mark III supports 24p cinema mode, the average camera does not. 44% of cameras support this mode.
470 shots more shots per charge
Pentax K-3 Mark III has longer battery life than the average camera (800 shots vs 330 shots). The average camera delivers 330 shots per charge.
740 mAh larger battery capacity
Pentax K-3 Mark III has a higher battery capacity than the average camera (1860 mAh vs 1120 mAh). The average camera has a battery capacity of 1120 mAh.
USB Power Delivery
Pentax K-3 Mark III supports USB Power Delivery, the average camera does not.
Dual card slots
Pentax K-3 Mark III offers dual card slots, the average camera does not. 13.3% of cameras offer them.
Has USB Type-C
Pentax K-3 Mark III has a USB Type-C port, the average camera does not. 14.5% of cameras use USB-C.
Has Bluetooth
Pentax K-3 Mark III supports Bluetooth, the average camera does not. 22.7% of cameras support Bluetooth.
Supports Wi-Fi connectivity
Pentax K-3 Mark III supports Wi-Fi, the average camera does not. 47.8% of cameras support Wi-Fi.
Smartphone remote control
Pentax K-3 Mark III supports smartphone remote control, the average camera does not. 46.2% of cameras support smartphone remote control.
Newer USB version
Pentax K-3 Mark III supports a newer USB version than the average camera (USB 3.2 Gen 1 vs USB 2.0). The average camera uses USB 2.0.

Connectivity & Storage

Why is Pentax K-3 Mark III worse than the average camera?

Hide

2.08x heavier
Pentax K-3 Mark III is heavier than the average camera (820 g vs 395 g). The average camera weighs 395 g.
No flash
Pentax K-3 Mark III does not have a built-in flash, the average camera does. 73.4% of cameras have a flash.
29.6 mm taller body
Pentax K-3 Mark III is taller than the average camera (103.5 mm vs 73.9 mm). The average camera has a height of 73.9 mm.
14.6 mm wider
Pentax K-3 Mark III is wider than the average camera (134.5 mm vs 119.9 mm). The average camera has a width of 119.9 mm.
27.5 mm thicker
Pentax K-3 Mark III is thicker than the average camera (73.5 mm vs 46 mm). The average camera has a thickness of 46 mm.
2.08x heavier
Pentax K-3 Mark III is heavier than the average camera (820 g vs 395 g). The average camera weighs 395 g.
What it is: The total weight of the camera body, which affects comfort while carrying and shooting.
When it matters: When you carry the camera all day, travel often, or prefer a lighter setup.
Importance: MEDIUM
Good value: 500 g or less
Pentax K-3 Mark III is heavier than the average camera (820 g vs 395 g). The average camera weighs 395 g.820 g vs 395 g
No flash
Pentax K-3 Mark III does not have a built-in flash, the average camera does. 73.4% of cameras have a flash.
What it is: Indicates the presence of an integrated light source to illuminate subjects in low-light conditions.
When it matters: When you need a quick built-in light for fill flash or simple low-light shots.
Importance: LOW
Pentax K-3 Mark III does not have a built-in flash, the average camera does. 73.4% of cameras have a flash.
29.6 mm taller body
Pentax K-3 Mark III is taller than the average camera (103.5 mm vs 73.9 mm). The average camera has a height of 73.9 mm.
What it is: The height of the camera body, measured from top to bottom.
When it matters: When you care about how compact the camera feels in a bag or in hand.
Importance: LOW
Pentax K-3 Mark III is taller than the average camera (103.5 mm vs 73.9 mm). The average camera has a height of 73.9 mm.103.5 mm vs 73.9 mm
6.07x more expensive
Pentax K-3 Mark III is more expensive than the average camera (£1760 vs £290).
Pentax K-3 Mark III is more expensive than the average camera (£1760 vs £290).£1,760 vs £290
14.6 mm wider
Pentax K-3 Mark III is wider than the average camera (134.5 mm vs 119.9 mm). The average camera has a width of 119.9 mm.
What it is: The width of the camera body, measured from side to side.
When it matters: When compact packing, grip comfort, or bag fit matters to you.
Importance: LOW
Pentax K-3 Mark III is wider than the average camera (134.5 mm vs 119.9 mm). The average camera has a width of 119.9 mm.134.5 mm vs 119.9 mm
27.5 mm thicker
Pentax K-3 Mark III is thicker than the average camera (73.5 mm vs 46 mm). The average camera has a thickness of 46 mm.
What it is: The depth of the device profile, excluding the camera bump unless specified.
When it matters: When you prefer a sleek, slim profile that slides easily into tight pockets.
Importance: LOW
Pentax K-3 Mark III is thicker than the average camera (73.5 mm vs 46 mm). The average camera has a thickness of 46 mm.73.5 mm vs 46 mm
5.2% worse value for money
Pentax K-3 Mark III has a worse value-for-money score than the average camera (5.92 vs 6.224).
What it is: An indicator that combines the camera's overall rating with its cost.
When it matters: When you want to know how much overall quality you get for the price.
Pentax K-3 Mark III has a worse value-for-money score than the average camera (5.92 vs 6.224).5.92 vs 6.22

Total

Overall

Display & Design

Expert reviews

dpreview.com

30/03/2021

Summary of the review

Pentax K-3 Mark III initial review

The Pentax K-3 Mark III is a premium APS-C DSLR designed for traditional photographers, featuring a 26MP BSI CMOS sensor, a 1.05x optical viewfinder, and 5.5-stop in-body image stabilization. Its robust magnesium-alloy construction, 12 fps burst rate, and improved 101-point SA FOX 13 AF system are key advantages. However, the camera carries a high $2,000 launch price and features a fixed rear LCD rather than a tilting or articulating screen. Limitations include a 1.3x crop in 4K video recording, limited video duration, and AF tracking that falls short of modern mirrorless competitors.

amateurphotographer.com

12/07/2021

Summary of the review

Pentax K-3 Mark III review

The Pentax K-3 Mark III is lauded as a high-end APS-C DSLR offering exceptional image quality, a robust weather-sealed chassis, and an industry-leading 1.05x magnification optical viewfinder. Key strengths include effective 5-axis in-body image stabilization and extensive tactile controls, catering to dedicated users who prefer a traditional DSLR experience. Conversely, the review notes significant limitations, specifically the fixed, non-articulating rear touchscreen and slow contrast-detect autofocus in Live View mode. Furthermore, the high launch price positions the camera as a premium niche product compared to modern mirrorless alternatives.

digitalcameraworld.com

11/08/2021

Summary of the review

Pentax K-3 Mark III review

The Pentax K-3 Mark III is a powerful, rugged APS-C DSLR equipped with a 25.7-megapixel back-illuminated sensor, a PRIME V processing engine, and a 5-axis in-body image stabilization system offering up to 5.5 stops of shake compensation. It delivers exceptional still image quality, boasting an impressive dynamic range that excels at higher ISO sensitivities up to 25,600, along with dense, rich JPEG color reproduction. Built for speed, the camera features a 101-point SAFOX 13 autofocus system and shoots bursts at a swift 12fps. Handling is aided by highly customizable controls, a clear pentaprism viewfinder, and unique, advanced exposure modes like TAv. However, the camera's high-speed capabilities are severely restricted by a very shallow buffer depth that holds only 37 JPEGs or 32 raw files, meaning it cannot sustain top speeds for more than three seconds. Furthermore, its physical design feels heavily rooted in the past; it relies on slow contrast-detect autofocus in live view and features a completely fixed rear touchscreen with no tilting mechanism. Video functionality is also treated as a minor addition, suffering from a significant crop factor...

photofocus.com

05/08/2021

Summary of the review

Pentax K-3 Mark III: A superb DSLR that simply costs too much

The Pentax K-3 Mark III is a rugged, magnesium-alloy APS-C DSLR built like a tank with exceptional weather sealing, offering the best autofocus and tracking system Pentax has produced to date. It excels in handling due to its deep, comfortable ergonomic grip and highly customizable layout featuring ten remappable buttons designed to keep users out of the menus. Performance-based highlights include a large, lag-free 100% coverage optical viewfinder, highly responsive 3.2-inch touchscreen interface, built-in 5-axis image stabilization (IBIS), and exceptional image quality characterized by vast dynamic range and remarkable high ISO performance usable up to ISO 25,600 or 51,200. However, the camera suffers from several notable design and performance limitations relative to its high price tag. It lacks an articulating LCD screen and does not have a built-in GPS module, forcing users to purchase a separate dongle to use the specialized Astrotracer star-tracking mode. From a hardware standpoint, it only offers a single UHS-II compatible card slot while the second slot is restricted to slower UHS-I speeds, and it features a small buffer that bogs down after firing roughly 30...

shutterbug.com

07/06/2021

Summary of the review

Pentax K-3 III APS-C DSLR Review

The Shutterbug review highlights the Pentax K-3 III as a robust, high-performance APS-C DSLR, praising its exceptional build quality, ergonomic design, and accurate autofocus system. Key strengths include sharp, high-contrast imagery with natural color rendition, cementing its status as a premium, feature-rich camera for dedicated enthusiasts. However, the review notes that the camera's performance is highly dependent on quality glass, with older lenses like the 55-300mm requiring significant post-processing for sharpness and contrast. Additionally, the $1,999 body-only price tag positions it as a significant investment compared to modern mirrorless alternatives.

85mm-photography.com

30/03/2021

Summary of the review

Hands-On Review Pentax K3 IIIGo to product viewer dialogue for this item.

The Pentax K3 III is a highly responsive APS-C flagship DSLR featuring a 26-megapixel five-axis stabilised BSI sensor, an upgraded processor, and a dramatically modernised touchscreen menu interface. Designed as a robust, premium product built to handle harsh conditions, its standout features include a massive, full-frame-sized optical viewfinder and a significantly faster autofocus system with improved object tracking and low-light performance. Photographers will benefit from a rapid memory card interface supporting dual SD slots with configurable RAW/JPG routing, a continuous shooting buffer that clears quickly, and a versatile USB-C 3.2 port that supports fast data transfer, in-camera battery charging, and external device power-bank capabilities. Despite these advancements, the camera lacks several common features, most notably a tilting or articulating rear display, which complicates flat-perspective and tripod-based shooting. Additionally, it completely omits a built-in flash, integrated GPS tracking, and a dedicated external battery charger, relying entirely on the internal USB connection instead. While the continuous burst shooting is officially rated at 12 frames per second, real-world testing with continuous focus tracking yields a slower 7 to 8 frames per second. These...

mikemuizebelt.nl

30/03/2021

Summary of the review

Pentax K-3 mark III Review

In his review of the Pentax K-3 Mark III, Mike Muizebelt highlights a robust APS-C camera featuring an overhauled design with exceptional build quality and a high-coverage, 1.05x magnification optical viewfinder. The camera is praised for its significantly improved autofocus, specifically offering precise subject tracking and a redesigned mirror/shutter mechanism that reduces vibration for increased keeper rates. Conversely, the review notes significant limitations, such as only one of the two SD card slots supporting the faster UHS-II standard. Additionally, the camera is limited by a fixed, non-articulating rear screen and a buffer that can fill quickly during high-speed shooting.

photoark.co.uk

26/11/2024

Summary of the review

Pentax K-3 iii Review

Pentax K-3 III Review Summary The Pentax K-3 III is a highly robust APS-C DSLR that aggressively embraces traditional reflex technology in a market heavily dominated by mirrorless systems. Reviewer Steven praises its exceptionally bright and contrasty optical viewfinder, which outperforms classic film camera finders and makes manual focusing effortless. The camera features an outstandingly ergonomic grip tailored well for larger hands, top-tier weather sealing capable of handling harsh environments, and a significantly modernized, customizable menu system. Performance-wise, its upgraded image stabilization allows users to confidently shoot at higher ISO levels, while its beautiful 24MP DNG RAW files offer incredible dynamic range and clean details that require very little post-production. However, the camera suffers from several design and functional drawbacks. Its upgraded autofocus module offers 101 focus points, but only 41 are selectable by the user, and their heavy bias toward the center forces photographers to rely on clumsy "focus and reframe" techniques. The body is also cluttered with an "acned rash" of physical buttons, switches, and dials (like RAW, SR, and AF Mode) that feel outdated and are easily...

pentaxforums.com

03/09/2026

Summary of the review

Pentax K-3 Mark III Review - Conclusion Would you like a summary of the pros and cons found in these specific reviews?

The Pentax K-3 Mark III is lauded as a robust, top-tier APS-C DSLR featuring significant upgrades, including a 25.7-megapixel sensor, exceptional build quality with extensive weather sealing, and an impressive 1.05x optical viewfinder. Its re-engineered 101-point autofocus system offers best-in-class performance for the brand, producing high-quality images with excellent color and low-light capabilities. However, the review highlights drawbacks, noting that the autofocus still trails behind modern mirrorless competitors and the 3.2-inch screen is fixed, limiting versatility for specific shooting angles. Additionally, the camera is limited by a heavy 4K video crop, lacking advanced video features and carrying a high price point that may limit its appeal to established K-mount users. For the full, in-depth conclusion, visit PentaxForums.com. YouTube

digitalkamera.de

17/06/2021

Summary of the review

Pentax K-3 Mark III Review - Digitalkamera.de

The Digitalkamera.de review highlights the Pentax K-3 Mark III as a robust, premium APS-C DSLR for traditionalists, featuring a 25.7-megapixel sensor with excellent image sharpness, 5-axis IBIS, and an exceptionally bright 1.05x optical viewfinder. Key advantages include its durable magnesium alloy weather-sealed body, extensive physical controls, and an improved 101-point phase-detection autofocus system for through-the-viewfinder shooting. Conversely, the review notes a high launch price and significant limitations, such as a fixed rear screen that lacks articulation. Furthermore, the live view performance is hampered by sluggish contrast-detection autofocus, and 4K video capabilities are constrained by a heavy crop factor.

chip.de

25/08/2021

Summary of the review

Pentax K-3 III Review - CHIP(digitec.ch) | 13.07.2021 | A Matter of Settings: Pentax K-3 Mark III Review - Digitec

The Pentax K-3 III is an APS-C DSLR camera that delivers outstanding image quality, receiving a dynamic test rating of "Good" (1.9) as of June 2026. Its primary advantages include an integrated in-body image stabilizer that allows a tolerance of three to four aperture stops, a robust weather-sealed magnesium body, and excellent handling thanks to deep button customization options. Photographers will also benefit from its premium optical pentaprism viewfinder with 1.05x magnification and 100% field of view, alongside a 25.7-megapixel back-side illuminated sensor that omits an anti-aliasing filter to maximize sharpness. This configuration yields a strong resolution performance of 2,106 line pairs at minimum ISO and a generous battery capacity that supports up to 860 photos when shooting through the viewfinder. On the downside, the camera has notable limitations, starting with a weak autofocus system that behaves sluggishly, particularly in low-light environments. Video features are minimal, offering only basic UHD recording at 30 fps and Full-HD at 60 fps, both of which are hindered by disruptive focus-hunting movements. Furthermore, while the sharp 3.2-inch rear touchscreen offers convenient menu navigation, it...

photoinfos.com

01/04/2021

Summary of the review

Pentax K-3 III DSLR: Review, test, and hands-on experience

The review evaluates the Pentax K-3 Mark III, Ricoh's 2021 flagship 25.5-megapixel APS-C DSLR camera. The reviewer praises its outstanding low-light capabilities, noting that its maximum ISO of 1.6 million delivers highly usable results at ISO 12,800 and remains functional even up to ISO 51,200. Additionally, the camera features a vastly improved dual-autofocus system with 101 AF points (25 cross-sensors) that provides faster response times and reliably drives both modern motor-integrated lenses and older legacy "screw-drive" (Stangen-Autofokus) lenses. It is also highly valued for its exceptionally large, bright optical viewfinder, cross-generation battery compatibility (D-LI90), built-in shake reduction, and a responsive new touchscreen interface with an added joystick.

fotomagazin.de

18/05/2022

Summary of the review

In Review: Pentax K-3 Mark III - fotoMAGAZIN

The Pentax K-3 Mark III review by fotoMAGAZIN highlights it as a highly capable APS-C DSLR that excels in rugged durability and traditional shooting comfort. Major advantages include its incredibly robust magnesium-aluminum alloy body, which is sealed with 95 protective joints against dust and moisture. Additionally, it is praised for its integrated 5-axis "Shake Reduction" image stabilisation system providing up to 5.5 stops of compensation—a feature missing from Canon and Nikon DSLRs. This hardware also powers a clever "Pixel-Shift" mode to minimise moirés and extract finer details. Photographers will appreciate the upgraded, bright glass pentaprism viewfinder with a large 1.05x magnification, alongside dual SD card slots (with UHS-II compatibility on slot one), and crisp JPEG image quality up to ISO 3200. Conversely, the camera suffers from several distinct drawbacks that prevent it from fully competing with mirrorless rivals. A primary complaint is the premium launch price of €2,000, which makes it the most expensive in its test class and oddly places it above its own full-frame sibling, the K-1 Mark II. Performance-wise, the contrast-based autofocus in Live View remains relatively...

85mm-photography.com

03/09/2026

Summary of the review

Hands-On Review: Pentax K-3 III with 85mm Lens

Based on the hands-on review of the pre-production Pentax K3 III, this APS-C flagship DSLR marks a major technical evolution for the brand, offering premium build quality that feels durable enough to "drive nails into a wall". The camera's standout feature is its massive, bright optical viewfinder, which delivers a full-frame feel and keeps the photographer deeply connected to the scene. Performance-wise, it features a 26-megapixel BSI-sensor with 5-axis stabilization, a massively improved autofocus system with better object tracking, and impressive low-light capabilities that outshine the full-frame Pentax K1. It also introduces a fast dual SD card interface, a snappy processor, responsive touchscreen menus, and a modern USB-C port that supports quick data transfer, in-camera charging, and device power-bank capabilities. However, the reviewer highlights several notable drawbacks, particularly the frustrating omission of a tilting/articulating screen, which makes tripod use and low-angle photography difficult. The camera also lacks a built-in flash and GPS—features that landscape photographers will sorely miss. Additionally, the continuous shooting rate with focus tracking reaches only about 7–8 FPS in practice, falling short of its advertised 12 FPS...

nikon-fotografie.de

18/01/2024

Summary of the review

Review - Pentax K-3 Mark III | Network Photography Community

The Pentax K-3 Mark III Monochrome review highlights superior black-and-white image quality, featuring exceptional noise performance at high ISO and enhanced sharpness due to the removal of the color filter array. It retains traditional, robust DSLR ergonomics, offering specialized in-camera image profiles like Standard, Hard, and Soft for refined contrast. Conversely, the review notes significant drawbacks, including an outdated, non-articulating rear monitor and a restrictive, unintuitive joystick for menu navigation. Additionally, in-camera JPEGs underperform compared to external software conversions, suggesting a software-based, rather than fully re-engineered, monochrome engine. Netzwerk Fotografie

digitec.ch

13/07/2021

Summary of the review

A Matter of Settings: Pentax K-3 Mark III Review - Digitec

The Pentax K-3 Mark III, reviewed on Digitec, is a specialized 26-megapixel APS-C DSLR designed for traditional enthusiasts, featuring an exceptionally large, bright optical viewfinder and a robust, weather-sealed body with, extensive customization options. Its strengths include superb ergonomics, a highly functional joystick for AF tracking, and excellent image quality with strong dynamic range, making it a "photographer's camera". Conversely, significant drawbacks include a fixed, non-articulating touchscreen monitor, the lack of built-in GPS, and limited buffer capacity during high-speed shooting compared to modern mirrorless alternatives. While powerful, its high price point and reliance on traditional DSLR design make it a niche choice, as discussed on Digitec.

pictures-magazin.de

25/02/2022

Summary of the review

PRACTICAL TEST: Pentax K3 Mark III - Pictures - The Photo Magazine

The Pentax K-3 Mark III review by Hans Günther Beer highlights the camera as an exceptionally robust, completely redesigned 25.7-megapixel APS-C DSLR tailored for outdoor and nature photographers. The camera stands out for its tank-like, magnesium-alloy build quality and top-tier weather sealing, offering crisp tactile feedback despite its heavy gaskets. Key operational strengths include a brilliantly bright and massive 1.05x magnification optical viewfinder, an effective 5-axis in-body image stabilisation system providing 5.5 stops of compensation, and an advanced 101-point phase-detection autofocus system that tracks fast incoming subjects accurately at up to 12 frames per second. Additionally, it features unique sensor-shift technologies like Pixelshift Resolution—which noticeably enhances detail, microstructures, and colour accuracy—and Astrotracer compatibility for pinpoint astrophotography without star trails. If you need more details from this Pictures - Das Foto-Magazin review, let me know

lesnumeriques.com

18/06/2021

Summary of the review

Pentax K-3 Mark III Test: An expert DSLR with multiple photo functions

The Pentax K-3 Mark III is an expert-level APS-C DSLR camera designed specifically for photographers who prioritize an authentic optical viewfinder experience over mirrorless alternatives. The review highlights several notable strengths, including its robust, weather-sealed magnesium alloy construction and an exceptional optical viewfinder with 1.05x magnification, making it one of the best in its class. It delivers highly effective sensor-shift image stabilization (Shake Reduction) that powers advanced photographic modes like Pixel Shift, an anti-aliasing filter simulator, and astro-tracking. Furthermore, it features refined expert ergonomics with multiple custom control dials, a precise control joystick, dual storage slots, and the ability to shoot while charging via USB-C. On the downside, the camera suffers from several functional limitations that reflect its outdated core technology compared to contemporary mirrorless systems. Its autofocus performance is highly inconsistent, stalling severely in low light and taking up to three seconds to acquire focus during live view. The 4K UHD video capability feels like an afterthought; it lacks standard modern tools like 4K/60p recording, log profiles, focus peaking, and functional autofocus during video capture, while also introducing a...

photoklub.com

10/05/2021

Summary of the review

K-3 Mk III Review

The Pentax K-3 Mark III marks a significant evolutionary step for the brand's APS-C DSLR lineup, released nearly six years after its predecessor, the Mark II. Reviewers and long-time users praise the camera's exceptional optical viewfinder, noting that its larger, brighter view offers instant visual comfort and serves as a major point of differentiation in a market dominated by mirrorless systems. The camera introduces substantial hardware and software upgrades, most notably a massively improved autofocus system that handles tracking—such as eye tracking—and action shooting much more efficiently than older Pentax models. Additionally, its ergonomic design remains highly intuitive for existing users, and its high-ISO performance is exceptional, yielding highly usable images even up to 20,000 ISO without heavy post-processing. However, the review highlights several prominent drawbacks, chief among them being its exceptionally high and restrictive launch price, which many users feel is too expensive compared to competing mirrorless alternatives. The camera also drops certain practical features found on previous generations, such as the built-in flash, internal GPS functionality, and an articulated or tilting screen. For videographers, the 4K video mode...

galaxus.fr

13/07/2021

Summary of the review

A Matter of Settings: Pentax K-3 Mark III Review

The Pentax K-3 Mark III is a specialized APS-C DSLR designed for purists, featuring a rugged, weather-sealed magnesium alloy body, excellent ergonomics, and deep customization options like pixel shift and star tracking. Its core strengths lie in its high-quality construction, robust build, and effective 5.5-stop image stabilization for dedicated photography. Conversely, the camera trails modern mirrorless alternatives with inferior Live View/video capabilities, a fixed rear screen, and slow memory card writing speeds. The review also notes mediocre battery life and the lack of an external charger, confirming the device is aimed specifically at SLR traditionalists rather than videographers. galaxus.it

camerarace.com

31/03/2026

Summary of the review

Pentax K-3 Mark III - Review and Technical Specifications

The Pentax K-3 Mark III is a rugged, tropicalised APS-C DSLR offering exceptional weather sealing, a 12 fps burst rate, and an improved autofocus system. Key advantages include its 5.5-stop in-body stabilization for low-light, dual SD slots (one UHS-II), and a high-resolution viewfinder. Limitations include a fixed rear display, lack of a built-in flash, and a significant crop factor when recording 4K video. Furthermore, while dual card slots are present, only one supports faster UHS-II speeds, which can affect writing performance, according to the Camerarace review. YouTube

arnaud-dauphin.com

27/03/2026

Summary of the review

Pentax K-3 Mark III Black Review: An Exceptional APS-C Body

The review of the Pentax K-3 Mark III Black by Gabrielle Gautier on Gastronomie Photos highlights it as an exceptional APS-C DSLR camera that seamlessly blends performance with robust build quality. Designed for demanding photographers, it features a 25.7 MP sensor, 4K video resolution (2160p), and a redesigned optical viewfinder that offers 100% field coverage and enhanced brightness. On the positive side, the review praises the camera’s highly efficient autofocus system boasting 101 focus points, its rapid 12 frames per second burst mode tailored for sports and wildlife photography, and excellent low-light capabilities backed by a massive maximum ISO of 1.6 million. Users will also benefit from its intuitive, redesigned menu system, improved shutter button feel, dual optical stabilization, and complete backward compatibility with existing Pentax K-mount lenses. However, the reviewer notes several downsides that might give potential buyers pause. A major complaint is the relatively steep price tag, which is further exacerbated by the omission of essential out-of-the-box accessories such as a dedicated battery charger and a proper camera strap. From an ergonomics standpoint, the joystick placement can occasionally...

digitec.ch

13/07/2021

Summary of the review

A Matter of Settings: Pentax K-3 Mark III Review

The Digitec review highlights the Pentax K-3 Mark III as a robust, high-end APS-C DSLR featuring extensive customization, an exceptional 1.05x optical viewfinder, and advanced 5-axis image stabilization supporting tools like Astrotracer. While praised for its rugged construction and precise, deeply customizable settings, the camera is limited by a fixed rear monitor that restricts shooting angles and a lack of user preset export functionality to SD cards.

photolari.com

01/06/2021

Summary of the review

Pentax K-3 III: the last great DSLR?

The Pentax K-3 III is an APS-C DSLR camera priced at €2000, designed specifically to appeal to classic photography purists and loyal Pentax users who prefer optical viewfinders over mirrorless transitions. On the positive side, the review highlights its exceptional, high-magnification optical viewfinder as the best ever tested on an APS-C camera, alongside a vastly improved, highly solvent 105-point autofocus system that excels at tracking motion. Additionally, its 26-megapixel CMOS sensor delivers superb image quality and impressive dynamic range in RAW files, while its incredibly robust, weather-sealed chassis gives it unmatched physical durability, famously compared to a tank capable of cracking nuts. Conversely, the review outlines several critical drawbacks, notably its poor video capabilities, as it is merely the brand's first camera to introduce 4K recording, arriving far too late to compete with modern video standards. Its high-speed burst mode of 12 frames per second is heavily bottlenecked by a shallow buffer that bogs down after just 30 consecutive shots in either RAW or JPEG formats. Furthermore, its €2000 price tag forces it into direct competition with superior full-frame alternatives...

juzaphoto.com

23/01/2023

Summary of the review

Pentax K3 III Review - JuzaPhoto

The Pentax K-3 III is a highly solid, professionally built APS-C DSLR that uniquely embraces traditional reflex technology while integrating highly innovative computational photography software. During a real-world landscape test in Norway, the camera's 25.7-megapixel sensor demonstrated excellent dynamic range and strong high-ISO performance up to ISO 3200. Its standout features include a powerful in-camera multi-exposure "Composite Average" mode that acts as a built-in ND filter by merging up to 9,999 frames to eliminate noise and drastically boost shadow recovery. Additionally, it features the exclusive "Astrotracer" mode, which uses sensor-shift stabilization to track star movements for up to 10 minutes without requiring an external equatorial mount, alongside automated horizon correction and a unique ability to act as a USB-C power bank to charge external devices. Pros & Cons Breakdown Despite these impressive innovations, the camera has notable limitations, particularly regarding hardware and older lens compatibility. Pros: Exceptional, robust build quality with ergonomic handling. Industry-leading computational exposure merging (up to 9,999 shots). Useful automatic horizon alignment and reverse USB-C charging. Fast 11 FPS burst rate paired with accurate viewfinder autofocus. Cons:...

fotografia.it

05/06/2021

Summary of the review

Pentax K-3 Mark III: a completely new DSLR

The Pentax K-3 Mark III review highlights a heavily modernized flagship APS-C DSLR that prioritizes traditional, through-the-viewfinder still photography over video capabilities. Its standout feature is a newly engineered optical pentaprism viewfinder boasting a massive 1.05x magnification, achieving a full-frame-like viewing experience within a cropped sensor body. Alongside a revised autofocus system with 101 focus points and a faster shutter mechanism capable of shooting up to 12 frames per second, the camera introduces an advanced 25.7MP back-illuminated CMOS sensor. This hardware delivers excellent low-light image quality, supporting an astronomical maximum sensitivity of 1,600,000 ISO. The camera offers a balance of significant advantages alongside notable design and feature drawbacks: Pros Exceptional Viewfinder: The 1.05x optical viewfinder delivers a viewing field equivalent to full-frame models like the Pentax K-1 or Nikon D780. Robust, Ergonomic Build: It features a highly durable, weather-sealed magnesium alloy body paired with intuitive physical dials and a precise AF joystick. Advanced Stabilization & Tech: The 5-axis in-body image stabilization compensates for up to 5.5 stops and powers unique features like Pixel Shift Resolution and Astrotracer tracking. Cons Fixed...

galaxus.it

13/07/2021

Summary of the review

A matter of settings: testing the Pentax K-3 Mark III - Galaxus

The Pentax K-3 Mark III is presented as a specialized, rugged DSLR tailored for traditional photographers, featuring exceptional build quality, an ergonomic grip, and an extraordinary depth of custom settings. It delivers solid image quality enhanced by a 5.5-stop stabilizer, enabling advanced features like pixel shift and astrotracing. Conversely, the review notes significant weaknesses, including poor Live View/video performance, a fixed screen, slow card writing speed, and limited battery life compared to mirrorless rivals. Additionally, the package lacks an external charger, making the camera, while rewarding for enthusiasts, less suitable for mainstream users.

fotografiafineart.it

27/02/2024

Summary of the review

PENTAX K-3 MARK III COLORS - PROS AND CONS

The webpage introduces a video review of the Pentax K3 Mark III. It is hosted by Damiano Durante on Fotografia Fine Art. The text outlines image evaluation under various lighting conditions. Key pros include its rugged, weather-sealed magnesium body. Ergonomics are excellent with a comfortable physical grip. The optical viewfinder offers a bright 1.05x magnification. It delivers brilliant color science and sharp details. High-ISO noise management handles dark settings up to 1,600,000. It shoots quickly at 12 frames per second. In-body shake reduction stabilizes handheld shots effectively. However, the review openly addresses several critical cons. The 3.2-inch rear touchscreen is completely fixed. It does not tilt for awkward shooting angles. Its 4K video features apply a heavy sensor crop. Live-view autofocus tracking is slow compared to mirrorless alternatives. Only one SD card slot supports fast UHS-II speeds. The camera omits an integrated GPS module. The retail package excludes an external battery charger. In conclusion, it remains a premium, niche DSLR choice. It mostly favors traditional photographers loving optical viewfinders.

digitec.ch

13/07/2021

Summary of the review

A Matter of Settings: Testing the Pentax K-3 Mark III - Digitec

The Digitec review highlights the Pentax K-3 Mark III as a robust, highly customizable DSLR tailored for photography purists, praising its exceptional build quality, rugged weather-resistant design, and excellent ergonomics. It offers significant, deep customization options and solid out-of-the-box settings, though it is described as a niche tool for dedicated DSLR users. Conversely, the review notes significant drawbacks, including mediocre live view/video performance and a lack of an articulating screen compared to mirrorless alternatives. Other cons include slow memory card writing speeds, subpar battery life, and the absence of a dedicated external battery charger. galaxus.at

focus-review.com

27/01/2022

Summary of the review

Pentax K-3 Mark III Review – One of a Kind

The Pentax K-3 Mark III stands out as a unique release from Ricoh, serving as one of the very few traditional DSLR cameras featuring an optical viewfinder and a mirror system in a market dominated by mirrorless alternatives. This model brings considerable upgrades over its predecessor, the Mark II, by introducing a new 26-megapixel BSI APS-C sensor paired with a PRIME V processor that boosts burst shooting speeds up to 12 frames per second. It is built with a highly durable, weather-sealed magnesium alloy body and boasts refined ergonomics, including a touchscreen, an extra control dial, a joystick, and a larger 1.05x magnification viewfinder. Additionally, it marks a milestone for Pentax by incorporating 4K video recording, a USB-C port for in-camera charging, and an updated autofocus system featuring 101 AF points (with 41 user-selectable points) paired with an advanced 307,000-pixel RGB+IR metering sensor. The review highlights several key strengths and weaknesses of the camera: Pros: The primary advantages include its exceptionally robust, dust- and moisture-resistant build, an improved 5.5-stop image stabilisation system, a high-resolution sensor with a Pixel Shift high-res...

mikemuizebelt.nl

30/03/2021

Summary of the review

Pentax K-3 Mark III Review - Mike Muizebelt

In his review, Mike Muizebelt describes the Pentax K-3 Mark III as a robust, overhauled APS-C DSLR offering exceptional build quality, superior weather sealing, and refined ergonomics. The camera excels in performance with a redesigned 1.05x optical viewfinder and an improved autofocus system suitable for fast-paced wildlife and sports shooting, while maintaining fast burst speeds and high-ISO capabilities. Conversely, the review highlights that the heavy, durable magnesium-alloy body sacrifices portability for robustness. Other disadvantages include limited buffer depth for extended bursts, a fixed rear screen, and restricted video capabilities, establishing it as a dedicated stills tool rather than a competitive hybrid camera.

fotografiebeginner.nl

02/05/2023

Summary of the review

Pentax K-3 Mark III Monochrome Review | APS-C

The Pentax K-3 Mark III Monochrome is presented by FotografieBeginner.nl as a specialized APS-C DSLR for black-and-white photography, featuring a 25.73-megapixel sensor without a color filter for superior tonal depth. Key strengths include a robust, weather-sealed magnesium alloy build, 12fps continuous shooting, high ISO sensitivity up to 1,600,100, and solid battery performance. Conversely, the review notes constraints such as a fixed 3.2-inch LCD screen that limits, rather than aids, creative angles and a relatively heavy 820-gram body compared to mirrorless rivals. The 101-point autofocus system is functional but outmatched by newer competitors, making it a dedicated tool favoring pure monochrome quality over modern versatility.

Pentax K-3 Mark III Review | 108 Data compared

Best prices in UK

Best prices in US

Best rankings

Verdict

Technical Specifications of Pentax K-3 Mark III

Pentax K-3 Mark III vs the average camera

Why is Pentax K-3 Mark III better than the average camera?

Why is Pentax K-3 Mark III worse than the average camera?

Graphic comparison of Pentax K-3 Mark III and

Third-party reviews

What customers like about Pentax K-3 Mark III?

What customers dislike about Pentax K-3 Mark III?

Expert reviews

Best alternatives

Compare Pentax K-3 Mark III with