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Tamron 20 mm f/ 2.8 Di III OSD M1:2 F050 Lens

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Tamron 20 mm f/ 2.8 Di III OSD M1:2 F050 lens

Tamron 20 mm f/ 2.8 Di III OSD M1:2 F050 lens

Tamron 20 mm f/ 2.8 Di III OSD M1:2 F050 lens

Tamron 20 mm f/ 2.8 Di III OSD M1:2 F050 lens

Tamron 20 mm f/ 2.8 Di III OSD M1:2 F050 lens


Tamron 20 mm f/ 2.8 Di III OSD M1:2 F050 MTF Chart

Optical design

Tamron 20 mm f/ 2.8 Di III OSD M1:2 F050 optical design

Format: 35mm SLR

Type: Prime lens

Focusing: Auto Focus (AF)

Lens mounts: Sony E, Sony E

First year of production: 2020

Optical design: 10 elements in 9 groups

Features: Macro lens
User reviews (1)

Photos (2)

Tests (0)

Owners (0)

Views (1797)

Average price:


Focal lengthMax. apertureMin. apertureBladesMin. Focus (m.)Filter Ø (mm.)Weight (gr/oz)Length (mm/in)

Additional information:
  • angle of view 94°30'
  • max magnification 0,5x
  • Ø 73 mm

TheTamron 20mm F2.8 Di III OSD M1:2 (Model F050) is an extreme wide angle prime lens for full frame sensor cameras with Sony FE-mount.

The lens submits:
- Moisture-Resistant Construction
- Fluorine Coating (for protection and safe cleaning)
- Advanced anti-reflection coating
- Circular Aperture
- Fast Hybrid AF, but micromotor
- Eye AF*
- Direct Manual Focus (DMF)*
- In-camera lens correction (shading, chromatic aberration, distortion)*
- Camera-based lens unit firmware updates*
* Features vary by camera. Please consult your camera’s instruction manual for details.
  This model is used only in MF operation with SONY NEX series and alpha 5000 in video mode.
* As of September, 2019.

Links to online resources:
PDF Files:
Posted by: Andreas Lindemann   Date of publication: 26.01.2020

Photos taken with this lens Tamron 20 mm f/ 2.8 Di III OSD M1:2 F050:

Rhododendrin Bud - Full Image
Autor: tightcamera
5 0 895

Rhododendrin Bud - 100% Crop
Autor: tightcamera
5 0 677

Mechanical quality4.001
Optical quality5.001
Pricing / Value5.001
Overall lens rating

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Owner reviews: Tamron 20 mm f/ 2.8 Di III OSD M1:2 F050

tightcamera 01.05.2020 18:31:05
Period of use: 1 month


The overall image quality is very good, in my opinion. I was actually rather impressed given some of the less-than-amazing reviews of this lens that I’d read right after it hit the market. The center of the image is exceedingly sharp and crisp, and edge/corner sharpness is respectable as well when stopped down to f/4 or higher. As far as I can tell, there isn’t a noticeable color bias with this lens. Chromatic aberration is very well controlled at all aperture settings, based on my testing. Bokeh is pleasing enough, although it likely won’t wow anyone…and for a wide angle lens, this is perfectly acceptable.

It's light and small, but doesn't feel like a toy. 

AF is pretty solid in AF-S, but struggles a bit more in AF-C, especially in less than ideal lighting. There is some noise, but it's probably not enough to bother video uness you are relying on the camera's mic to capture audio. 


Like most wide angle lenses, tihs one has quite noticeable barrel distortion and vignetting. There is a lens profile for this lens in Adobe Camera RAW, and that does address both distortion and vignetting. However, to fully correct for the distortion also really streteches the very edges of the image in ways that might be noticeable and off-putting in some instances. 


Full review with sample photos is here:

If you are looking for a wide prime for street vlogging that needs super-quiet and very accurate continuous autofocus, this is NOT your lens. For the other 95% of us, the Tamron 20mm is a really good inexpensive option to put a wide prime lens in your arsenal. It’s sharp with very good IQ, has okay AF, is small and light, and won’t break the bank. Also, it can almost take the place of a macro lens with it’s super-short minimum focusing distance. Hard to beat it as a value lens, in my view.