Replacement Focusing FPL-WF10x/22 widefield, focusing 10x eyepiece for the Nikon Eclipse Ci biological microscope and Nikon Eclipse Ni Biological microscope. FN = 22. This focusing 10x replacement eyepiece has a 30mm diameter and includes a reticle retaining ring for a 26mm diameter 
reticle. This focusing 10x eyepiece is comparable to the Nikon CFI 10x / MAK30100 eyepiece and works with the following microscopes:
- Nikon Eclipse Ci Biological Microscopes
- Nikon Eclipse Ni Biological Microscopes