Excellent investment. I am a masters student in biology. I don't have much time during the day to work in the lab, so I need him to work at my home at night. I work with foraminifera down to 63 microns in size and see them with no problem. I have recommended this to anyone who is very professional. There is no installation guide, but they are very easy to assemble after seeing the picture here. The only true villain is really hard. So once you've chosen a place to place it, it stays there because it's really hard. Also very high. Another thing is that if you're looking at something at 63µm you need to use a different light because the LED doesn't allow you to get any closer if you're working in a petri dish like me.
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