About the lowprice sector:
A webcam has the disadvantage that it is all the time connected to your computer and has usually a bad quality of the picture.
These pencams have roughly the same resolution, but you can move them around and - sometimes - also take a mimi-mini-video.
Depending on how much money you want to invest and if you prefer taking pics or vids you should make your choice. Any further suggestions?

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If every material thing is gone, my smile and my tears stay left.