Originally posted by landscaped1 let me try again....
a pentax M 35mm on a FF/35mm camera...
does it have the same FOV as the new DA 35 on an APS-C sensor?
I guess what I'm asking is wether or not the DA series lenses fall into the same crop factor catagory as older pentax film lenses or has that been accounted for in the production of the new series?
~Nick
A 35mm lens on a full frame camera will give you a wider view (larger field of view), than the same 35mm lens mounted on a APS-C camera.
A lens marked with having 35mm focal length has... 35mm focal length, whether it be an old M42 screw mount type, a FA or DA lens.
It would be plain stupid for any maker to "account" for a crop factor by falsifying the focal length of the lens, as the fl is a fixed physical property. The only thing a maker sensbly could do, is to give several angles of view (usually stated across the sensor's diagonal) for different sensor sizes.
Ofcourse some makers are that stupid and will mark lenses on their point-and-shoot cameras with 35mm-equivalent focal lengthes. But luckily until now, no maker of a DSLR adopted that bad habit.
Ben