Tamron 20mm f 2 8 di iii osd m1 2 vs zeiss loxia 21mm f 2 8?

Both are small, fast wide primes for Sony E full-frame bodies, and they suit different shooters.

The Tamron 20mm f/2.8 is the easier pick. It has autofocus, it's small and inexpensive, and it focuses close enough for half life-size shots. It isn't stabilised, though.

The Zeiss Loxia 21mm f/2.8 is manual focus only. It's a favourite for landscapes and astro, where you set focus once and leave it. Its 21mm view is slightly wider than the Tamron's 20mm, and that difference is small.

If you want autofocus and close-up work, I'd go with the Tamron. If you shoot the night sky or landscapes and don't mind focusing by hand, the Loxia is the one I'd choose.

Written by Claude from this site's pages.