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Anton van Leeuwenhoek was first to build a real one and use it
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the magnification was 9x and the vision was blurry
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when using one the thing you look through is 10x the magnification and the scopes at the bottom have their own magnification and you need to times that by the lens
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Zacharias Jansen and his dad where messing with lenses and put like 7 in a tube
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this dude named hooke did somthing called Micrographia in 1665 and i think is was where he looked at stuff and drawed it