Quote:
Originally Posted by semilog
I can't speak to the CV lenses but the C-Biogon is incompatible with the Fujifilm adaptor because the metal cylinder that houses the rear element group is too large in diameter to fit within the Fujifilm adaptor's baffles. That lens does fit with the Kipon (Krap-on) adaptor. But the Fujifilm adaptor is much better made than the Krap-on (I own both).
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I have both the Fuji and a Rainbow m adapter. It is the internal cylinder housing the Fuji electronics which is where the problem resides as Semilog has indicated. Fuji provides a plastic gage to help u figure out if your lens will have an issue. It is divided into two sections. The first is to c if the rear element diameter is narrow enough to fit thru the smaller hole caused by the electronics housing. The second one is used to check depth in terms of two different perspectives, if I remember correctly. The depth of rear element at inf if rear element is too wide and the depth if it is narrow enough to fit thru the narrower hole. The later one is to ensure rear element does not touch sensor..
My 35 sumicron 4th generation fails the diameter test. I don't have any of the other lenses u mentioned, but I do have a cv 28 f1.9 which worked fwiw.
Gary