Recent content by roger_t

I envision a simple mechanical frame that could hold a syringe, or something similar, locating itself on features of the camera (say the F mount) and then by virtue of its mechanical location relative to the frame would position the tip of the syringe precisely over the ratchet axle. It would...

There are very thin endoscopes for specialized work, but they would likely be awfully expensive. I still like your syringe idea. I can see where that fast spinning ratchet gear would cause oil to fly in all directions if oil is applied too liberally. An intriguing idea is to 3D print a frame...

Ah! Very interesting. Yes, the graphite is not necessary, good to know. The whole area did look pretty oily. As you mentioned, the key is to deposit a precise amount of oil but is difficult considering that it is being applied blindly. Hmmm.

Did you find that the errant oil caused functional problems? Or, did the squeal and/or aperture malfunction come back after a time?

This is quite a stunning thread. Good on you, Andreas, for tackling this. I recently purchased a used F4 on ebay. It is in pristine condition. Possibly too pristine as it likely sat unused for quite a while. The DOF preview button causes a squeal which I did not recollect with my first F4...