Originally posted by Caro Also it seems like a lot work just to make it work properly on the DSLR. But perhaps I can use the photosnaiper, only without using the the automatic trigger?
For the ease of use, I advise you to use the flanged m42 to pk adapter and adjust infinity focus by moving the name ring for 0.7 mm or so. Also, at some point in history, pk adapters that would completely replace the m42 mount (unscrewing the three screws and replacing it) were available online from Italian seller on ebay. Maybe they still are but my very fast search just now, did not give any results. Either solution will give you a more stable and secure use of your lens, as the non-flanged adapters can get wobbly with such a heavy lens.
About automatic trigger, there are two solutions, both of which require slight modification to the photosnaiper. First easy solution is to take a cable trigger and install it so that it is activated by the photosnaiper trigger, and the other one is to take a wireless trigger, install it so that it is activated by the photosnaiper trigger and take the diode out (extend the diode connectors by wires) and put it where the camera sees it.