Originally posted by stevewig Rio, how do you use the Nikkor 85/2? Is this a non-AI lens that can be "force-fit"?
At first I force-fit it. Then I decided to mod it. I should have started with something more prosaic, y'know like for practice, but it luckily survived my clutziness. As it was, the mod was simple. The lower edge of the aperture ring has a couple protrusions: an arc and a nub. Process: cut them off. Tools needed: Dremel with metal-cutting disk, cheap jeweler's screwdrivers. Machine shop: wood railing on back porch. Steps involved:
* Unscrew mount, remove aperture ring.
* Position aperture ring for cutting.
* Remove protrusions, so ring bottom is smooth.
* Sand off any burrs, blow dust away, and re-assemble.
Mine had a couple of aperture-link flags sticking down, which I also removed, probably needlessly. The aperture now has no detents, but
big deal. It makes a snug fit on my K20D and, as it (safely) shorts the mount pins, I use it with Catch-In-Focus.
I did the same with a Tokina RMC 35-135 with similar base, and I may repeat the process with an Albinar (Tokina) 70-210. On a couple other lenses, the 'protrusions' are a ring all around the circumference of the base, not worth trying to slice away, so I just force-fit those. Haven't lost one yet!