Fix Broken Aperture Ring

Manual focusing is a great exercise and the quality of the glass is often surprising.

Fix broken aperture 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. Be sure you see an actual aperture stop right behind the lens that blocks light from the sky. Click stop mechanism is self secured so it s safe to remove aperture ring without loosing tiny metal. Or if you notice a weak area have it beefed up before it cracks or becomes damaged.

Sometimes the ring must be altered a bit to give it strength. I really enjoy using m42 aka screw mount lenses. The lens i used here in this video is th. There are three basic types of m42 aperture controls listed here in chronological order.

I recently disassembled one sample for repair. Vivitar 70 210mm f4 5 lens version made by kobori has interesting mechanical construction of aperture transmission. This little instructable is about how to make aperture control f number setting on each of these types of lenses work on your dslr. It still looks great from above but is much stronger.

If there is a ring like this farther down the tube ignore it it s no problem. Be careful reflections can sometimes look a lot like these rings. Most are about 2 5 or so. 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.

Have your jeweler repair the point that is broken. In the case of the above ring a gold section was added underneath. As usual first step is to unscrew four mount bolts and remove thick and massive mount ring.