ocean2059 wrote:
I really enjoy all your Pentax images with different K mount lenses posted here. In your Pentax-M 28mm f3.5 lens, is it a K-mount or M42 mount lens? I also noticed that there are K mount 28mm f3.5 lens with 49mm filter thread and some with 52mm filter thread as well. Are there any performance difference between them? Thank you in advance if you could provide some info.
Thanks for your kind comment and for following along in this thread! All of my lenses are bayonet K mount lenses coming either from the original SMC "K" series, the miniaturized "M" series, or the auto aperture "A" series. I have quite a collection and I enjoy using all of them regularly.
I can't speak specifically to your question about the M28f3.5 vs K28f3.5, but I'd suspect the K version might be slightly superior optically as Pentax wasn't trying to miniaturize that lens. Usually the larger lenses show an optical advantage, but this is only an assumption on my part. The links that were provided by tsdevine should provide some clarification.
Thanks again, and if you have some Pentax gear, please join in!