Originally posted by farfisa Looks like just holding the lens in front of your old *ist DS isn't all that bad either.
Great shot!
I can't find the post now, but somebody else on this forum converted one to Pentax, but infinity was pretty short (wow, that sounds weird).
I think I saw the post.
the problem is that if you do not make measurements and really go after all the excess material you can there is just no way to claw back the 3.46mm needed to retain infinity focus on a pentax camera.
the FD regestry distance is 42mm against pentas's 45.46mm.
I have managed with minolta MD lenses to achieve infinity focus by removing the mount, a spacer or two, and surface grinding some parts a little, and using a flanged adaptor which is quite thin, compared to a regular lens mount to retain infinity focus, but that is dealing with only a 1.8mm difference in regestry distance, not 3.46mm as it would be on canon.
what I would really love, would be for a reputable lens maker, to really look at this and offer well designed multi coated mount converters, although in controlled conditions the cheap ones do work pretty well, just avoid strong light / high contrast, and wide open, at least from my experience.