Asher, the elmarit-m 28mm asph ( 28/2.8 ) is a cracker of a lens in a tiny package. If I had not bought this 28/2, I would have definitely gone for the f2.8
It is a bit contrasty though, but that is to my liking. Just have to watch for both sides of the
Histogram.
You cannot go wrong with either one...however, I find 28mm to much for my general shooting on a ff.
Besides the price, one of the main reasons I just am not interested in the Leica Q.