These are probably the ones you think of when microscopes come to mind. Using a single light as a sample illuminator and compound lenses for magnification, these have a single eyepiece. This is a bit uncomfortable, as you need to close one eye to get a clear image of what you are looking at on the slide. The eyepiece has a power of about 10X and the objectives or lenses on the nosepiece range from 2X to 50X depending on your particular microscope. The big one here is the single eyepiece. Binocular microscopes are becoming more common.
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