On Aug 19, 2014, at 6:32 PM, P.J. Alling <webstertwenty...@gmail.com> wrote:
> 28mm is actually normal on APS-c. To get to wide angle you need at least > 24mm. Now the K 30mm f2.8 is better optically than almost all of the 28mm > lenses Pentax made. There is a 28mm M/A at f2.0 and a K version with a > different optical formula. God knows what those sell for they are pretty > rare as well as being pretty fast for wide angle lenses. Also the 30 is > supposed to be optically superior to them all. The f3.5 versions in the 28mm > lenses in K,M,A are also supposed to be better then the f2.8 versions, though > I've not ever handled any of them. I have both an A 24mm f2.8 and a K as > well, both sell for three or more times more than the 28mm lenses, I bought > them both when they were still relatively inexpensive. > > If you're looking for sharper, the f3.5 versions are that even wide open, and > they are about the same price as their f2.8 brethren. However using an f3.5 > manual focus wide angle lens without focusing aids makes critical focus > difficult to achieve. I say that from experience as I have a 35mm f3.5 SMC > Takumar that while beautifully made, and very sharp, makes looking through > any viewfinder very dim, and even dimmer on those cameras actually made for > them, it's really best to set hyper-focal distance and aperture on it and > shoot that way. Trade-offs, trade-offs, trade-offs. Always a lot to think about. Thanks for giving me places to start, though at the moment the dizziness is such as to make me want to throw up my hands and say, “The A 28/2.8 is good enough.” But as you say, it’s effectively normal, and I’ve definitely experienced occasions on which I would like to have had a little wider field of view. ------------------------------------------------------------------------------------------ Eric Weir Decatur, GA USA eew...@bellsouth.net "You keep on learning and learning, and pretty soon you learn something no one has learned before." - Richard Feynman -- PDML Pentax-Discuss Mail List PDML@pdml.net http://pdml.net/mailman/listinfo/pdml_pdml.net to UNSUBSCRIBE from the PDML, please visit the link directly above and follow the directions.
