DPRTV tested the Tamron 20mm f/2.8 and found it to be a good value with some middling flaws that fit its price point. You can find details about the short video below or watch it above.
- Weather sealed
- Very lightweight
- 67mm filter thread
- 1:2 Macro close up capability
- Very sharp at 2.8 and even better at 5.6
- The lense is software corrected for distortion
- LoCA has cyan and magenta fringing
- Mechanical vignetting even into the center
- Busy Bokeh
- Polygonal shape highlights
- You can get so close that you have to take the lens hood off
- Soft bokeh when shooting very close
- Focusing speed is a little slow but not critical on an ultra-wide lens
- Manual focus throw is huge
- Has a lot of focus breathing that makes it not great for video
- Ok sun stars but not great
- Good for an environmental portrait if you keep your subject in the center
- It is convenient and lightweight at a low price
- Lots of fair to middling aspects, but still an interesting lens
- If you want to do astrophotography you might want a faster lens
- The Sony 20mm f/1.8 is almost optically perfect but much heavier at a much higher price tag
Tamron 20mm F/2.8 Di III OSD M1:2（Model F050):
B&H Photo / Amazon / Adorama
Tamron 24mm F/2.8 Di III OSD M1:2（Model F051):
B&H Photo / Amazon / Adorama
Tamron 35mm F/2.8 Di III OSD M1:2（Model F053):
B&H Photo / Amazon / Adorama
