Nikon Science & Laboratory - Recent Questions, Troubleshooting & Support
Why would my coarse focus be stuck?
dont know the model but usually the coarse focus is rack and pinion
could be debris jamming or a broken tooth. Should be able to take
the plate locating the pinion off. Take all the lenses off the body before investigating
Pinion gear for raising & lowering condenser tray is broken need part #
In the Optiphot there are two small grub screws under the left hand side of the condenser column. Once loosened the metal housing of the pinion can by pulled or pushed out and the new one inserted. You may need a small mirror to see the screws due to their hidden position. You can then replace the pinion in which the black nylon gear will have broken
Nikon Optiphot stage is falling
This might be sign of trouble, because the Nylon gears inside might be worn out. I did not noticed a tension ring on Optiphot 1 or 2. The Nikon S and Metaphot from 1960s to 1976 have Nylon gears with tension ring adjustments.
The stereo eyepieces are dark,
It might be that Objective lens is not seated properly or very dirty. So perhaps by rotating the objective block may help before trying to clean it. Also try to start with the lowest magnification to see that you have functional microscope before trying higher magnifications. Good luck.
I'm using the Nikon ECLIPSE
There are a few things that could cause a shadow in the field of view.
First if the condenser is not centered, this can create a crescent shaped shadow and rob your image of light. Center the condenser and raise it to within about a 16th of an inch from the top of the stage.
Second, the slider on the head which diverts light from the eyepieces to the camera must be fully engaged to the "camera" position
Third, make sure that the diaphragm on the condenser is not closed too far. There is an adjustment ring for this. Set it to 70-80% of the numerical aperture of the objective you are using.
Fourth: if there is a "swing out" condenser lens you will need it completely in or out depending on the objective you are using. for 2x-5x you need the swing out condenser lens completely out of the light path. For objectives 10x and up you need the swing out condenser lens completely in and centered in the light path.
If these things are properly adjusted you should not have a shadow in the field of view. If you still have a problem, let me know.
Not finding what you are looking for?