Re: 85mm f1.2 on medium format
Sergei, yes indeed! I'm also not sure what you mean by the extension rings. Drilling was necessary to bring the lens close enough to the sensor so I could get a usable focusing range.
Closer subject - we need lens out farther from sensor? So, depending on how close you really ever go it might be possible to just push lens a bit out, without damaging mirror or anything
Just a thought. I mean with normal focal length its better to stay away anyway to avoid distortion. That also would sort out problem with 6m max distance.. Or not. Depends
Need to think. Given min focusing on regular 85/1.4 to be about 3.5 meters.. there is got to be some slack
So if we take the lens "tail" out, and replace it with thinniest of extension rings, we should be able to add them slowly if we ever need to get closer, or remove them if we need to get farther.
Extension rings i am talking about - are set of 3 "auto macro extension rings" - cant remember how much they cost, but should be less than AFD body
So only thing we would miss is mechanical converter from Contax (in your case) or Canon (if someone feel like trying Canon 85/1.2 and see if it will be about same) to Mamiya 645 bayonet(mount)..
You did inspired me to play with few old petzvals i had laying about (got 2 projection ones, that wont cover 4x5) - their focal length is 260 and 150.. Looked like straightforward stuff.. But i didnt like picture i was getting (not enough corners to get actual swirl ) , so i took it apart.