You asked
Ttartisan af 14mm f 3 5 vs sony e 16mm f 2 8?
The TTArtisan AF 14mm f/3.5 is the wider of the two. On APS-C it frames like 21mm on full frame, and it fits both Sony E and Fujifilm X, so it's the one I'd pick if you're not sure which system you'll stay with.
The Sony E 16mm f/2.8 is a pancake that frames like 24mm on full frame. It's brighter, at f/2.8 against f/3.5, and it's slim enough to live in a coat pocket. It only fits Sony E, though, so it's for Sony owners who want a compact everyday wide.
Both are autofocus primes without stabilisation. If you want a wider view, go with the TTArtisan. If you're on Sony and want something small with a bit more light, the Sony is the better match. For how aperture changes background blur on APS-C, see the focal length converter.
Written by Claude from this site's pages.