10.1-inch full focus high-definition Digital Microscope, 12 million pixels, touch button, 50-1600x magnification, adjustable LED shadowless light, 2.4G wireless remote control, support for PC connection

SKU: GW45.0062

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Yes, it can indeed take photos and transfer them to your desktop in JPG format. 
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Hello, thank you for your question. Yes, this microscope is suitable for observing both gemstones and coins. 
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Compatible, Mac11.0 or higher. 
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Yes. The image remains clear as the magnification changes from large to small.