Fix Broken Aperture Ring

In this video we will be looking at a way to fix aperture ring getting stuck in manual lens or in any vintage lens.

Fix broken aperture ring.

Most are about 2 5 or so. This little instructable is about how to make aperture control f number setting on each of these types of lenses work on your dslr. There are three basic types of m42 aperture controls listed here in chronological order. Vivitar 70 210mm f4 5 lens version made by kobori has interesting mechanical construction of aperture transmission.

I really enjoy using m42 aka screw mount lenses. Or if you notice a weak area have it beefed up before it cracks or becomes damaged. As usual first step is to unscrew four mount bolts and remove thick and massive mount ring. While the ideal option is to return to the same store or jeweler from which the ring was bought large chains like kay jewelers will perform repairs no matter where the ring was purchased.

Also the main lens should be at least two inches across. Sometimes the ring must be altered a bit to give it strength. The lens i used here in this video is th. Manual focusing is a great exercise and the quality of the glass is often surprising.

I recently disassembled one sample for repair. Have your jeweler repair the point that is broken. If there is a ring like this farther down the tube ignore it it s no problem. It still looks great from above but is much stronger.

The catch is that all three types can have no response to turning the obviously marked aperture ring without being broken. Click stop mechanism is self secured so it s safe to remove aperture ring without loosing tiny metal. A ring with a small fracture in the band or that is completely broken into two or more pieces should be taken to a store to be soldered and filed back together.