Sigma SD Quattro Review | 108 Data compared

The Sigma sd Quattro is a highly unconventional mirrorless camera featuring an APS-C Foveon X3 Quattro sensor, delivering exceptional, medium-format-like image quality and high sharpness at a lower budget. Its strengths lie in its robust build quality, highly intelligent and practical ergonomics designed by photographers for photographers, and a clear, pleasant menu interface. It also introduces a "Super-Fine Detail" (SFD) mode that captures 7 bracketed images to create high-dynamic-range RAW files bursting with detail, although these files are massive and require the proprietary Sigma Photo Pro software to process. However, the camera demands significant discipline due to several heavy compromises, receiving a low overall rating of 2 out of 5 stars. Its performance is notably slow, plagued by a lengthy 5-second startup time and a highly erratic autofocus system that frequently fails to lock onto static subjects. Image usability is limited strictly to low light levels, as noise and magenta artifacts render images unusable above ISO 400. Additional drawbacks include the complete absence of a video mode, restrictive lens compatibility tied exclusively to the deep 44mm Sigma SA mount, aggressive...

The Sigma sd Quattro mirrorless camera stands out for its highly atypical, muscular magnesium design and its unique APS-C Foveon X3 Quattro sensor architecture. Unlike standard sensors, this technology splits resolution across three physical layers—a 26 MP blue layer, a 6.5 MP green layer, and a 6.5 MP red layer—allowing it to generate massive 39 MP S-Hi JPEG files. When paired with the highly-regarded Sigma 18-35mm f/1.8 DC HSM Art lens, lab tests reveal exceptional center sharpness and remarkable consistency across focal lengths, particularly peaking at 35mm (a 52.5mm full-frame equivalent) at an optimal aperture of f/5.6. Economically, this combination provides an incredibly high-definition imaging option that costs a fraction of premium full-frame rivals, such as the 42 MP Sony Alpha 7R II setup.

The Sigma sd Quattro is a unique mirrorless camera praised for its exceptional medium-format-like image quality, driven by its 29-megapixel Foveon X3 three-layer sensor that captures RGB data for every single pixel. This hardware choice completely eliminates the need for an anti-aliasing filter or a traditional Bayer matrix, resulting in incredibly precise details, sharp textures, and rich color depth at low ISOs. Physically, the camera features a robust, weather-sealed magnesium alloy body, an excellent 1,620,000-dot screen, focus peaking, and a comfortable double-dial grip. These traits make it an affordable and highly capable tool for patient, disciplined disciplines like landscape and portrait photography. However, achieving this image quality requires significant compromises in performance and speed. The camera is notoriously slow, taking 5 seconds to turn on and over 1 second to shut down, while its hybrid autofocus system is inefficient and completely unsuited for sports or wildlife photography. Low-light performance is a major weakness, with a severe loss of image quality and the introduction of greenish tints at or above 400 to 800 ISO. Additionally, users are limited exclusively to Sigma’s...

The Sigma SD Quattro H is a niche APS-H format mirrorless camera built around a 45-megapixel Foveon sensor, capable of outputting highly detailed 51-megapixel images in its boosted S-Hi mode. It features an exceptionally solid magnesium alloy construction, an intuitive and customisable quick menu interface, and highly accurate colour rendering with excellent dynamic range at low ISO settings. Crucially for post-processing, the camera supports standard Adobe DNG raw file recording, which vastly accelerates workflow speeds by bypassing the notoriously slow proprietary Sigma Photo Pro software. However, the camera demands significant compromises in versatility due to its slow operational speed, sluggish autofocus response, and high battery consumption. Image quality drops drastically at sensitivities above 400 ISO, making it virtually unusable for low-light or fast-action photography. Physical limitations include a fixed, non-tilting rear screen, a laggy electronic viewfinder positioned far to the right, and compatibility restricted strictly to full-frame Sigma SA-mount lenses to fully utilise the sensor. Additionally, it carries a heavy 75% price premium over the standard APS-C version, making it an expensive, specialized tool best suited for tripod-based landscape and...

The Sigma sd Quattro H is a niche mirrorless camera that integrates a larger APS-H sized Foveon Quattro X3 sensor into the exact same weather-sealed body as its APS-C predecessor. The camera delivers an exceptional resolving power up to 400 ISO, producing sharp 51.2-megapixel JPEG images that can rival medium-format quality under the right lighting conditions. A major highlight of this model is its newfound ability to shoot in the universal Adobe RAW DNG format, which significantly improves post-processing workflow compared to Sigma's slow, proprietary software. Additionally, it features a logical user interface, USB 3.0 connectivity, and compatibility with excellent Sigma SA-mount lenses designed for full-frame systems. However, the camera suffers from severe usability limitations that restrict it to very specific photographic scenarios. Its overall operation is notoriously slow, marked by sluggish startup times, erratic shot-to-shot lag, and an autofocus system that is completely unsuited for fast action. Image quality degrades rapidly above 400 ISO, rendering the higher sensitivity settings practically unusable. Physical and hardware drawbacks are equally prominent, including a dismal battery life, an inability to recharge the device...