I see a Kenko Pinhole lens 02 on Nikon M2 mount listed on a local online selling forum. I did a Google search on the Kenko, could not find much - looking for info on what type of photo it might produce, soft and grainy as in some sample photos or sharper? Not sure of the Nikon M2 mount, this appears to be an extension tube, and assume its to make the pinhole image larger on the film. The gear is being sold with a Nikon F50, which I don't have a use for. Will the Nikon M2 mount work on my Nikon D80? Just thinking of using the Kenko and maybe the mount to take close up photos of my model railroad gear. Thanks!