Digital microscopes are a breed apart. This type of microscope inverts the light source, placing it above the sample. Standard optical microscopes place the light below the sample. You also get the 3D image like in stereo scopes. The difference is that the image is digitized and transmitted to a monitor or screen for viewing. Imagine watching cells divide on a 19 monitor. The user can take still photos or moving video of the sample in real time. I think you can see the advantages here. Look for binoculars that are nitrogen filled or nitrogen purged, this is a dry gas that is unaffected by temperature or moisture.
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