Quoting Tom Simpson <[EMAIL PROTECTED]>: > Im kinda' new here, but one of the things I picked up in passing is that > the K-mount might be fundamentally incompatible with a full-frame DSLR? > Or did I miss something? If I didnt, please explain to me what the issue > is, as I was under the impression that if you put a sensor the size of a > 35mm frame in the same place in reference to the lens as a 35mm frame of > lens, it would all work out just peachy.
only if light from lens is perpendiular to sensor. If it is not, as is the case with most wide-angle lenses, light is partialy lost. You can actually see this in Canon 5D (search for vignetting). In other words : it will work only with long lenses. This is also why Leica has choosen crop 1.3 (for price this high, they could surely afford 24x36mm sensor). Also, to accommodate shake reduction, imagining circle must be several mm bigger than sensor size. This is also why (I believe) some DA lenses actually work on 36mm (film) cameras without strong vignetting. > Why not? I hope not, as I am > hoping that the bigger sensor will give the quantum physicists more to I do not know what quantum physicists have to do with it, but 48x36mm sensor is twice as big as 24x36mm, thus they shouldn't have reasons to complain . Even though it is actualy cropped (by factor 1.3), from 645. B. -- PDML Pentax-Discuss Mail List [email protected] http://pdml.net/mailman/listinfo/pdml_pdml.net
