How to fix uneven illumination across the field of view in Nikon Eclipse 50i Microscope?
- TTrevor HughesAug 30, 2025
To fix uneven illumination or vignetting in the field of view of your Nikon Microscope, start by confirming that all parts, such as the nosepiece and condenser, are correctly attached. Next, ensure that movable parts like the optical path switching lever, nosepiece, and filter cube switching knob are correctly switched until you feel a click. Also, focus and center the condenser to ensure the field diaphragm image is focused on the specimen surface. Make sure the field diaphragm is open slightly wider than the field of view. Lastly, check for dirt or dust on the lens or container and clean it off.














