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There are times when I want to QUICKLY change from a K-zoom to one of my M42 primes and change back after. Does anyone have recent experience with the adapters currently on ebay? Or one of the retail sites?
Just to limit the responses to those that are relevant:
1. I have a Pentax adapter (somewhere) that I could use if I was only shooting M42.
2. No, it doesn't take that long to change the adapter but I don't like fumbling around with a bunch of different things when I'm in a hurry. I can be clumsy and then it is one more thing to keep track of.
3. I won't be drilling holes in the lens (like Hinman) but the lenses I'm using are heavy and I will have one hand on them at all times so the lack of a locking pin is not critical. (Vivitar S1 135/2.3, 200/3, 90/2.5 Macro, and 70-210/3.5)
4. I really want infinity or near infinity focus.
5. I would use a bit of the removable Loctite on the threads to secure the adapter.
TIA.