Michael Stanley asks about his Diaphot, on which the slider that switches between the eyepieces and the camera port has become sticky. We have had an even worse problem, which is that the prism on our Diaphot 200 (attached to a Noran Odyssey) appears to have slipped a few millimeters, with the result that the camera port now has a different field of view than the eyepieces, and the laser beam entering the confocal cannot be aligned properly. Nikon says that there may have been a problem with the cement used on very early Diaphot 200s (of which ours is one). To their credit, Nikon has promised to fix this microscope with one- week turnaround time, but we will be sans scope for that period. Chi-Bin Chien Dept. of Biology UC San Diego [log in to unmask]