Hi Wolfgang,
Have a look in the Micro Four Thirds section on the Olympus or Panasonic websites. Otherwise, you can now get M42 adapters for almost all digital cameras. The flange focal distance just has to be right, otherwise you won’t be able to focus to infinity. Take a look here:
Flange focal distance. There are also a few differences with the adapter-lens combination. With some lenses, the adapter sits so tightly that the aperture ring can’t be turned. And finally, there are also lenses which, although high-quality, can’t be focused properly on the digital camera; the image then comes out as if taken with a soft-focus filter – stopping down helps a little there. So it’s best to try out the combination beforehand. If you like, you can send me your email address via private message; I should still have one or two items at home that I could send you. Otherwise, adapting M42 lenses hasn’t been very successful for me.
Regards, Sven.