focus the lens by spinning it.
the speed, color, and picture quality are all quite excellent.
a laptop with an external unpowered usb hub might not supply enough current to run any webcam - eliminate the hub.
my 3 laptops have fixed webcams so i definitely need something like this to move around.
i wanted to connect this to a laptop via usb extension cable to view the back of equipment, but i don't think the focal length is short enough.
the light for illuminating the laptop keyboard is a nice extra.
picture quality is great, adjustments are simple and easy.
it also does not hold on to my laptop very well.
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