kit for making adapter Bayonet B to M42

If you decide to buy at the specified price and couldn’t get through by phone - write - I’ll be sure to answer and tell you where you can pick it up after checking and payment; kit for making an adapter for Bayonet B to M42; all medium format optics with mount B will be yours! The kit includes: - macro ring Bayonet B - new - macro ring M42 - new one must be cut to size; select or grind a ring for pressing/gluing both macro rings for non-SLR cameras, you can put it on the M39 adapter - there is no need to cut off the large ring Compared to film type 135; the lens has a larger area of the resulting frame; therefore, the image angle of the lens for a camera with a B mount should be calculated based on the frame diagonal of 85 mm; versus 43 mm (for film type 135) for film 120 the image angle is 86.45 degrees for film 135 the image angle is 51.1 degrees