Could a medium format zoom lens be fitted? There would then be room for movements? I am thinking about the Contax 45-90 of maybe the Pentax 6x7 zooms?
Of course, almost all medium format lenses are fitted.
I'm thinking how to set aperture contax 645 lenses.
it can do like canon eos lens.
from this camera site FAQ,
http://chiek.co.kr/list/view.php?id=6807&page=1&sn1=&divpage=1&sn=off&ss=on&sc=on&select_arrange=headnum&desc=asc&no=45. Can I set EOS EF lens aperture ?
Yes, Very Easy.
First, attaching your lens to EOS body (film or digital).
Second, set the aperture you want
Third, push depth of field preview button and holding and unmount it.
You will see your lens setting aperture.
and mount this cam.
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but I want to set aperture whenever free setting, not above.
so I will get contax645 lens and disassemble in near future.
I guess it is very easy and recoverable.
If possible, it's killer lens on this camera. contax645 lens price is very low on image quality.