Sony Alpha Blog posted its full Tamron 11-20mm f/2.8 Di III-A RXD review, which you can read here, or you can check out the pros/cons below:
Pros
- Unique zoom range
- Very good to excellent performance at 20mm in the centre
- Very good performances overall at 20mm
- Very good performance at F5.6 overall at 40mm
- Smooth background blur
- Very good color rendition
- Compact and light for a F2.8 zoom
- Good build quality
- Distorsion and vignetting moderate and automatically corrected by Lightroom
- Low CA
- Low focus breathing
- Very low coma
- Very Good AF
- Tamron lens utility to personnalise the MF button via USB C port
- Weather sealed
Average
- Ergonomics (no button)
- Resistance to flare
- Sharpness at 40mm wide open
- Price
Cons
- None
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Tamron 11-20mm f/2.8 Di III-A RXD:
B&H Photo / Amazon / Adorama