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Products in this category are evaluated mathematically under Frontumo Camera lenses Methodology v1.0 using verified laboratory benchmarks, technical specifications, and authentic consumer ratings with 0% commercial bias.
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Tamron 20mm F 2 8 Di III OSD M1 2 Review | 54 Data compared

Avg. price:~£220Lens mount:Sony EMaximum focal length:20 mmMaximum aperture (telephoto end):2.8Optical image stabilization:noMaximum angle of view:94.5 °

Tamron 20mm F 2 8 Di III OSD M1 2 Review: Compare 54 technical specifications and user reviews to see how this product ranks in the Camera lenses category and whether it is worth buying.

7.3

Overall score

Score
7.3/ 10
✕
What it is
An overall evaluation of the camera lens's quality, based on technical analyses and user reviews.
When it matters
When you need a quick reference to identify the best camera lenses on the market.
Score distribution
â–¼
<55-66-77-88-99-10
Score components

80%

7.0

Technical score

20%

8.6

User score

â–²Better than 69% of camera-lenses
7.0

Technical score

Technical score
7.0/ 10
✕
What it is
An assessment of technical performance for products in the Camera lenses category across these key areas: Mount & Format, Optics & Aperture, Focus & Controls, Stabilization, Build & Handling, Lab Scores.
When it matters
When you want to compare camera lenses based on technical performance and available features.
Score distribution
â–¼
<55-66-77-88-99-10
Score components

35%

7.1

Optics & Aperture

24%

9.8

Build & Handling

20%

6.0

Focus & Controls

10%

8.2

Lab Scores

8%

1.0

Stabilization

3%

1.0

Mount & Format

â–²Better than 66% of camera-lenses
8.6

User score

User score
8.6/ 10
✕
What it is
A rating that combines user reviews and the total number of reviews received by the camera lens.
When it matters
When real-world owner satisfaction and review volume matter to your decision.
Score distribution
â–¼
<55-66-77-88-99-10
Score components

70%

8.8

User ratings

30%

8.0

Number of reviews

Based on 607 buyer reviews from online shops.
How we calculate this
User ratings – average star rating across all shop listings, weighted by how many reviews each has, on a 1–10 scale.
Number of reviews – how many buyer reviews the product has, on a logarithmic scale; the 8% most-reviewed models in the category get 10.
â–²Better than 59% of camera-lenses
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Best rankings

Available: ranking among products currently available (including other versions of this product).All: ranking among all products in the database.
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Technical Specifications of camera lens Tamron 20mm F 2 8 Di III OSD M1 2

Technical score
Technical score
7.0/ 10
✕
What it is
An assessment of technical performance for products in the Camera lenses category across these key areas: Mount & Format, Optics & Aperture, Focus & Controls, Stabilization, Build & Handling, Lab Scores.
When it matters
When you want to compare camera lenses based on technical performance and available features.
Score distribution
â–¼
<55-66-77-88-99-10
Score components:

35%

7.1

Optics & Aperture

24%

9.8

Build & Handling

20%

6.0

Focus & Controls

10%

8.2

Lab Scores

8%

1.0

Stabilization

3%

1.0

Mount & Format

7.0
User score
User score
8.6/ 10
✕
What it is
A rating that combines user reviews and the total number of reviews received by the camera lens.
When it matters
When real-world owner satisfaction and review volume matter to your decision.
Score distribution
â–¼
<55-66-77-88-99-10
Score components

70%

8.8

User ratings

30%

8.0

Number of reviews

Based on 607 buyer reviews from online shops.
How we calculate this
User ratings – average star rating across all shop listings, weighted by how many reviews each has, on a 1–10 scale.
Number of reviews – how many buyer reviews the product has, on a logarithmic scale; the 8% most-reviewed models in the category get 10.
8.6
Popularity
Popularity
8.0/ 10
✕
What it is
An indicator based on the number of reviews received by the camera lens.
When it matters
When you want to see which camera lenses attract the most buyer attention and review activity.
Score distribution
â–¼
<55-66-77-88-99-10
Popularity:
Tamron 20mm F 2 8 Di III OSD M1 2 has a popularity score of 8 points, which is higher than 60.7% of camera lenses.
8.0
Value for money
Value for money
7.9/ 10
✕
What it is
An indicator that combines the camera lens's overall rating with its cost.
When it matters
When you want to know how much overall quality you get for the price.
Score distribution
â–¼
<55-66-77-88-99-10
Score components:

60%

7.3

Overall score

40%

9.4

Price

7.9
Lens type
prime
Lens mount
Sony E
Sensor format coverage
Full-frame
Filter thread size
67 mm
Teleconverter compatibility
no
Teleconverter compatibility
no
This camera lens does not support teleconverters. 15.3% of camera lenses support teleconverters.
Show more
Minimum focal length
20 mm
Maximum focal length
20 mm
Optical zoom
N/A
Maximum angle of view
94.5 °
Minimum angle of view
94.5 °
Show more
Focus motor
STM, linear motor
Minimum focus distance
0.11 m
Minimum focus distance
0.11 m
This camera lens focuses as close as 0.11 m, which is closer than 98.4% of camera lenses and equal to 0.5% of camera lenses.
Maximum reproduction ratio
0.5xx
Maximum reproduction ratio
0.5x
This camera lens reaches a reproduction ratio of 0.5x, which is higher than 91% of camera lenses and equal to 2.8% of camera lenses.
Full-time manual focus
yes
Full-time manual focus
yes
This camera lens supports full-time manual focus. 68.3% of camera lenses support full-time manual focus.
Override via DMF mode.
Internal focusing
yes
Internal focusing
yes
This camera lens supports internal focusing. 83.6% of camera lenses support internal focusing.
Show more
Optical image stabilization
no
Optical image stabilization
no
This camera lens does not support optical image stabilization. 29.1% of camera lenses include optical image stabilization.
Stabilization effectiveness (CIPA stops)
N/A
Weight
220 g
Weight
220 g
This camera lens weighs 220 g, which is lighter than 83.8% of camera lenses and equal to the weight of 0.2% of camera lenses.
Lens length
64 mm
Lens length
64 mm
This camera lens is 64 mm long, which is shorter than 78.6% of camera lenses and equal to the length of 0.2% of camera lenses.
Lens diameter
73 mm
Lens diameter
73 mm
This camera lens has a diameter of 73 mm, which is slimmer than 62.2% of camera lenses and equal to that of 3% of camera lenses.
Weather sealing (splashproof)
yes
Weather sealing (splashproof)
yes
This camera lens supports weather sealing. 50.2% of camera lenses support weather sealing.
Metal mount
yes
Metal mount
yes
This camera lens uses a metal lens mount. 93.6% of camera lenses use a metal lens mount.
Show more
DxOMark overall score
?
DxOMark sharpness score
?
DxOMark transmission
?
DxOMark distortion
?
DxOMark vignetting
?
Show more

Tamron 20mm F 2 8 Di III OSD M1 2 vs the average camera lens

246810TotalMount & FormatOptics & ApertureFocus & ControlsStabilizationBuild & HandlingLab Scores
  • Has fluorine coating
    Fluorine coating
    yes
    This camera lens has a fluorine coating, the average camera lens does not. 32.6% of camera lenses use a fluorine coating.
  • 290 g lighter
    Weight
    220 g
    This camera lens is lighter than the average camera lens (220 g vs 510 g). The average lens weighs 510 g.
    220 g vs 510 g
  • 0.31 x higher maximum reproduction ratio
    Maximum reproduction ratio
    0.5 x
    This camera lens has a higher maximum reproduction ratio than the average camera lens (0.5 x vs 0.2 x). The average lens has a maximum reproduction ratio of 0.192 x.
    0.5 x vs 0.192 x
  • 0.19 m shorter minimum focus distance
    Minimum focus distance
    0.11 m
    This camera lens has a lower minimum focus distance than the average camera lens (0.1 m vs 0.3 m). The average lens has a minimum focus distance of 0.3 m.
    0.11 m vs 0.3 m
  • 28.25 mm shorter lens
    Lens length
    64 mm
    This camera lens is shorter than the average camera lens (64 mm vs 92.25 mm). The average lens has a length of 92.25 mm.
    64 mm vs 92.25 mm
  • 1 more low-dispersion elements
    Low-dispersion elements
    3
    This camera lens has more low-dispersion elements than the average camera lens (3 vs 2). The average lens has 2 low-dispersion elements.
    3 vs 2
  • Newer release date
    Release date
    2020
    This camera lens was released more recently than the average camera lens.
    January 2020
    2020 vs 2016
  • 4 mm narrower lens barrel
    Lens diameter
    73 mm
    This camera lens is slimmer than the average camera lens (73 mm vs 77 mm). The average lens has a diameter of 77 mm.
    73 mm vs 77 mm
  • 15% better value for money
    Tamron 20mm F 2 8 Di III OSD M1 2 has a better value-for-money score than the average camera lens (7.92 vs 6.9).
    7.92 vs 6.89
  • 2.41x cheaper
    Tamron 20mm F 2 8 Di III OSD M1 2 is cheaper than the average camera lens (£220 vs £530).
    £220 vs £530
  • 1 more low-dispersion elements
    Low-dispersion elements
    3
    This camera lens has more low-dispersion elements than the average camera lens (3 vs 2). The average lens has 2 low-dispersion elements.
    3 vs 2
  • 0.31 x higher maximum reproduction ratio
    Maximum reproduction ratio
    0.5 x
    This camera lens has a higher maximum reproduction ratio than the average camera lens (0.5 x vs 0.2 x). The average lens has a maximum reproduction ratio of 0.192 x.
    0.5 x vs 0.192 x
  • 0.19 m shorter minimum focus distance
    Minimum focus distance
    0.11 m
    This camera lens has a lower minimum focus distance than the average camera lens (0.1 m vs 0.3 m). The average lens has a minimum focus distance of 0.3 m.
    0.11 m vs 0.3 m
  • Has fluorine coating
    Fluorine coating
    yes
    This camera lens has a fluorine coating, the average camera lens does not. 32.6% of camera lenses use a fluorine coating.
  • 290 g lighter
    Weight
    220 g
    This camera lens is lighter than the average camera lens (220 g vs 510 g). The average lens weighs 510 g.
    220 g vs 510 g
  • 28.25 mm shorter lens
    Lens length
    64 mm
    This camera lens is shorter than the average camera lens (64 mm vs 92.25 mm). The average lens has a length of 92.25 mm.
    64 mm vs 92.25 mm
  • Newer release date
    Release date
    2020
    This camera lens was released more recently than the average camera lens.
    January 2020
    2020 vs 2016
  • 4 mm narrower lens barrel
    Lens diameter
    73 mm
    This camera lens is slimmer than the average camera lens (73 mm vs 77 mm). The average lens has a diameter of 77 mm.
    73 mm vs 77 mm
  • 2 fewer aperture blades
    Aperture blades
    7
    This camera lens has fewer aperture blades than the average camera lens (7 vs 9). The average lens has 9 aperture blades.
    7 vs 9
  • 1 fewer aspherical elements
    Aspherical elements
    1
    This camera lens has fewer aspherical elements than the average camera lens (1 vs 2). The average lens has 2 aspherical elements.
    1 vs 2
  • 2 fewer aperture blades
    Aperture blades
    7
    This camera lens has fewer aperture blades than the average camera lens (7 vs 9). The average lens has 9 aperture blades.
    7 vs 9
  • 1 fewer aspherical elements
    Aspherical elements
    1
    This camera lens has fewer aspherical elements than the average camera lens (1 vs 2). The average lens has 2 aspherical elements.
    1 vs 2

Video reviews

Hands-on testing, unboxing, and real-world video evaluations

Expert reviews

In-depth analysis and verdict from leading tech publications

E
ephotozine.com
01/01/2020
Summary of the review
F
focus-review.com
29/01/2020
Summary of the review
P
pcmag.com
04/02/2020
Summary of the review
U
uk.pcmag.com
04/02/2020
Summary of the review
D
dustinabbott.net
12/02/2020
Summary of the review
C
cameralabs.com
14/04/2020
Summary of the review
C
contrastly.com
12/05/2020
Summary of the review
O
opticallimits.com
04/08/2021
Summary of the review
A
alphashooters.com
10/05/2026
Summary of the review
D
dpreview.com
18/03/2020
Summary of the review
L
lesdeuxpiedsdehors.com
09/02/2025
Summary of the review
E
ephotozine.com
07/02/2020
Summary of the review
L
lenstip.com
27/03/2020
Summary of the review
T
the-digital-picture.com
07/02/2020
Summary of the review
D
digitalkamera.de
22/09/2021
Summary of the review
L
lesdeuxpiedsdehors.com
25/06/2025
Summary of the review
Z
zielfoto.com
N/A
Summary of the review
P
phototrend.fr
30/01/2020
Summary of the review
L
lesnumeriques.com
21/10/2020
Summary of the review
L
lesdeuxpiedsdehors.com
24/06/2025
Summary of the review
T
tamron.eu
N/A
Summary of the review
D
digitalcamaralens.com
No especificada
Summary of the review
F
focus-review.com
16/01/2020
Summary of the review
F
frankwandelt.nl
2020
Summary of the review

Third-party reviews

Based on 607 buyer reviews from online shops.
Reviews last updated: July 2026 · How we calculate this

What we like about Tamron 20mm F 2 8 Di III OSD M1 2

  • Excellent value for money and affordable price point
  • Lightweight and compact design, weighing only 221g
  • Impressive 1:2 macro magnification with a short 0.11m minimum focus distance
  • Weather-sealed construction with fluorine coating on the front element
  • Strong center sharpness and optical performance at f/2.8 and f/5.6
  • Effective flare resistance and chromatic aberration control

What we don't like about Tamron 20mm F 2 8 Di III OSD M1 2

  • Significant barrel distortion that requires software correction
  • Autofocus is somewhat slow and produces audible noise, which may impact video
  • Noticeable focus breathing when adjusting focus
  • Corner sharpness is noticeably softer compared to the center
  • Lack of external controls like an AF/MF switch or aperture ring

Verdict

The Tamron 20mm f/2.8 Di III OSD M1:2 is a compact, ultra-wide prime lens designed for Sony E-mount mirrorless cameras, featuring a 20mm focal length, an f/2.8 maximum aperture, and a 1:2 macro magnification ratio with a minimum focusing distance of 0.11m. It is built with 10 elements in 9 groups, including LD and GM elements to suppress aberrations, and is exceptionally lightweight at 220g with a 67mm filter thread. Key pros include outstanding center sharpness, excellent flare resistance thanks to BBAR coating, and a moisture-resistant construction with a fluorine coating. However, the lens is noted for significant barrel distortion, relatively slow and audible autofocus performance, and some corner softness at wider apertures.

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