Microscopes range from basic brightfield optical to fluorescence and electron microscopes (EM) -- and are categorized by magnification, illumination, resolution, as well as intended use. Important buying considerations include: the quality of lenses and objectives, the light source and image capture system (if applicable), and the focus and sample manipulator options. EM system purchase considerations include the stability and capabilities of the electron beam(s) and capture system as well as the electronics and instrument type – bench top or floor. Software availability and support is also an important purchasing factor in long-term system operation.
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