Bob S. wrote: > The M lenses have a 49mm front element as a rule across the series. > The K and A both have 52mm front elements, and they use all the space! > They never made a 50mm f1.2 with a 49mm front filter size.
I think they could have done it in 49mm. It would have had the front- plate text on the front of the focus ring (like many A-series lenses) or on the side of the focus ring (like the M 200mm f/4 or A*85mm f/1.4). I think this cosmetic change was only applied to M and A series lenses, with the exception of the K 15mm f/3.5 and possibly one or two others. I doubt that Pentax thought a new 50mm f/1.2 to be a high priority. They wouldn't have saved much weight to justify an M lens, and the electronic contacts for an A-series lens might have been a bit difficult considering the size of the rear element. They only just managed to fit it into the mount as it is. And it would probably have been a financial disaster :) Cheers, - Dave http://www.digistar.com/~dmann/
