Once you get wider than 20mm, you generally do not encounter apertures wider than f/2.0, save for a few rare circumstances. One such option is the Sony FE 14mm f/1.8 GM, which positions itself as a fantastic creative tool for a wide variety of uses, and this excellent video review takes a look at the sort of performance and image quality you can expect from it in practice.
[ Read More ](Originally posted by Alex Cooke)