I would love to get a DA 21 or 15mm Ltd for street photography etc - however, they are f3.2 and f4 respectively. This is annoying - especially as a K10D owner where going over 400 ISO is not really an option.
Is it mechanically more difficult to make a wide angle lens fast? Or is the assumption that this is not needed for most uses? I guess a lot of people stop down to f8 or 11 for hyperfocal - still this is not always an option, or desirable. On Pentax Imaging they say these lenses are recommended for use indoors - IMHO f4 is often too slow for available light indoors.
Last edited by jeztastic; 02-08-2011 at 06:37 AM.