cme4brain
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Just a thought here, I am not a professional photog, just a well heeled amateur, having owned the Leica M8 and 8 lenses, several Voigt rangefinders, and currently a Nikon D600. I also have vintage film Nikon F. F2, F4 and the Canon F1 all with lenses, but I digress.
I note all of this cost for large format Hassey to have high resolution images. Would it not be more cost effective to just high-resolution scan a negative? There are multiple scanning companies that will do just that, and then you get a digital image. I would weigh the cost of this equipment (with its crop factor- negating the full size advantage of medium format) with scanning negatives of images taken with ONE shot.
Shelly Glaser: I have several pre-auto-focus, pre-CPU Nikon lenses, and they work fine on my Nikon D80 and D7000. The basic things to note -
(a) the lens must be of the AI type or later, or retrofitted to be AI-type (if made before 1977).
(b) The automatic diaphragm will work fine (close by itself at the movement of exposure and reopen after) but you should use it on M setting (Manual exposure - you select aperture on the lens and shutter speed on the camera - not too bad since you have instant display of the results) and focus manually, On the D700 (and I think also on the D7000) you can use A setting and let the camera select shutter speed automatically, though not all exposure measurement modes will work.
I think it is safe to say that non-CPU Nikon-compatible lenses (like Carl Zeiss and Samyang's), will work fine within these restrictions.
The problem with guesstimating your exposure on the Nikon D5100 is the camera itself- it is too automated to work with non-CPU lenses. That is why I bought the D300- it will work perfectlky with these lenses.