I really could use your collective wisdom and experience with unusual application of photographic equipment without regard to brand (kind of a definition of Alternative lenses, right?) I have a great collection of Pentax 645 lenses I bought to use with my Zork shift adaptor from Pentax 645 to Canon EOS (5D). The lenses I have are the 35mm (FA) the 45, 55, 75, 120 macro, 150 and 200.

I have bought a Fotodiox adaptor from Pentax 645 to Canon EOS and it works really great and has infinity focus as promised with all the lenses. I also bought a set of extension tubes which allow me close focus on the lenses I have. I just bought a Pentax 645 Autobellows to extend the magnification even more. So, the 75mm lens fits right on the front as expected, but the rear standard does not provide any way of attaching the zork or the pentax adaptor to EOS. It just has a screw retaining screw, and a space for something to allow attaching of the Pentax body, which in this case is not being used, as the 5D takes its place. Did I miss the part that couples the rear standard to the zork or fotodiox adaptor? Can someone please point out what I am missing to make this work?

Thank you in advance.

Sounds like you're missing the actual mount for attaching the 645 (or the adaptor)

mawz wrote:
Sounds like you're missing the actual mount for attaching the 645 (or the adaptor)
I think you are right about that... been searching the web trying to figure out where to buy the mount or why I didnt get it in the one I bought.
Any ideas?

artguy55 wrote:
mawz wrote:
Sounds like you're missing the actual mount for attaching the 645 (or the adaptor)
I think you are right about that... been searching the web trying to figure out where to buy the mount or why I didnt get it in the one I bought.
Any ideas?

Give Pentax a call. While they no longer sell the 645 kit new, they're still supporting it and should be able to get you the missing part.

artguy55 wrote:
I really could use your collective wisdom and experience with unusual application of photographic equipment without regard to brand (kind of a definition of Alternative lenses, right?) I have a great collection of Pentax 645 lenses I bought to use with my Zork shift adaptor from Pentax 645 to Canon EOS (5D). The lenses I have are the 35mm (FA) the 45, 55, 75, 120 macro, 150 and 200.

I have bought a Fotodiox adaptor from Pentax 645 to Canon EOS and it works really great and has infinity focus as promised with all the lenses. I also bought a set of extension tubes which allow me close focus on the lenses I have. I just bought a Pentax 645 Autobellows to extend the magnification even more. So, the 75mm lens fits right on the front as expected, but the rear standard does not provide any way of attaching the zork or the pentax adaptor to EOS. It just has a screw retaining screw, and a space for something to allow attaching of the Pentax body, which in this case is not being used, as the 5D takes its place. Did I miss the part that couples the rear standard to the zork or fotodiox adaptor? Can someone please point out what I am missing to make this work?

Thank you in advance.

Would you mind posting about the resolution/distortion/optical aberrations of the 645 FA 35mm once you've managed to find the missing part? I'm very keen on finding out how the Pentax 645 lenses (especially the 35mm) would perform on the Sony A900 with shift (how they perform on the 5D would be close enough for me to assess them, since I own one). Some samples would be great! Cheers!

Sounds like you're missing the rear mount of the bellows. It is removable and was intended to be mounted to the 645 body before attachment to the bellows.