Janos, I have attached two different 35mm SLR's to my scope with much success. For my fujica, the camera body uses threaded type lenses so it was a simple connection of a T-ring (that came with my scope. You could get a really cheap used one in such places as astromart or maybe andrews might have them too), straight onto the focuser which the camera then threads directly onto. However, with my olympus, the lenses attaches using a different kind of mount system (a screw-in bayonet type mount) so I needed an extra olympus T-ring adapter (bought it off astomart for a really good price) that connects the camera to the T-ring, which then attaches to the scope.
So that's my experience with connecting these ancient cameras. Hope that helped
