40X- 2500X Trinocular Compound Microscope, Kentfaith Laboratory Microscope with 7" Screen & Mechanical Stage

SKU: GW45.0097

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Hi, because it features a 5MP built-in camera, and the camera captures the image directly from the objective lenses, bypassing the eyepieces when you’re using the screen. 
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No,it doesn't. You can try to use the dark field filter, but the effect will not as good as a professional dark field microscope. 
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When cleaning the display, use a soft, non-abrasive cleaning cloth and gently wipe the surface of the screen. Avoid using cleaners containing alcohol or chemical solvents to avoid damaging the display surface. 
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Yes, but it requires extra adapters. 
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No, this product does not have a polarization function.