My girlfriend bought the 800x one just like that. I think it was around 50 bucks on ebay. Its hard for me to focus good with it since the zoom and focus are the same knob. Here's a couple pics of what i came up with. The second one you posted is pretty good to use. You cant hook it up to the computer but it works great for checking out the trichs.
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pushit Reviewed by pushit on . Microscope Buying Advice! I was watching weed wars on tv and the grower had problems with mites and when he brought it in the girl examined it with a microscope on a pc screen and rejected the harvest, hey, I'll smoke it! But do you think that's this sort of thing: Portable-USB-1-3MP-Digital-Microscope-Endoscope Then I saw this sort of thing: ebay.com/itm/360419353801?ssPageName=STRK:MEWAX:IT&_trksid=p3984.m1423.l2649]eBay - New & used electronics, cars, apparel, collectibles, sporting goods & more at low Rating: 5