Hi Douglas,
I think there are some folks on this forum who do tinker some of those impossibles. Not to mention the Nikon-on-Pentax thread. This
could be real fun and a learning experience as well I hope.
Here's one of those dumb-but-I-tried-it impossibles:
This lens is from a russian night vision device. It has an M42x1 mount (read: "Pentax screw mount"), but the rear elements are protuding
waaay deep behind the mount. So here's my "I-tried-something" solution: Just remove the whole rear lens group !
Half a lens and it has no aperture but you are getting infinity (on K100D,
here's more pics)
Mmmmh, another 'interesting' lens. There is the same lens (nearly) from the same night vision device which does not protude so much
behind the mount, seems to be a collectible right now (prices are rocketing up). For sure, you'll never get accurate colors from such a night
lens, but CA from hell .-) Please search on the forum.manualfocus.org for more (a good resource for any tinkerer)
Keep them coming,
Georg (the other)