I'm trying to find a decent 20 or 21 mm either in M mount (as I have an adapter M to FE) or A mount (as I have the EA4 adapter).
Has anyone used the Color Skopar lens on the a7r? (Either version - the f1.8 or the Pancake f4).
Or would I be better off with the Sigma 20 mm f1.8 (which doesn't get very good reviews) in an A mount?
Any help appreciated!