A got a box of "junque" with a set of medium format extension rings I need help knowing what camera they go to. I know the pictures are about as clear as mud. Just not good at doing black. The female opening is 60 mm. and has three cutouts that 25 + or- 1 and rotate on a ring. The male flanges are 20 mm. Thanks for any help. - Dave
No markings at all? If it's Hasselblad it will be stamped. They brand every little item.
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