User Guide

490 Series Microscope
AmScope Proprietary Page 55 of 64
Diopters
Small rings on the eyetubes, used to focus ocular lenses
(eyepieces).
Eye Guards
Eye Guards fit over the eyepieces, they are for comfort and to
protect the glass in the eyepiece.
Eyepieces
Eyepieces are also called ocular lenses. Eyepieces come in
many magnifications and you replace them by swapping them
out of the eyetubes.
The eyepieces magnify the specimen further from the first
magnification through the objective lens. Each eyepiece is
marked with 2 numbers. The first number is the magnification and
the second is the field of view.
For example, an eyepiece marked WF10/20 has a magnification
of 10X and a field of view of 20mm.
Eyetubes
Eyetubes are also called ocular tubes. Eyetubes house the
eyepieces and camera adapters. You change eyepeices by
removing them from the eyetubes and replacing them with the new
ones.