About 3 weeks ago I setup a home office for a guy that spends most of his time on video conferences. He was using a 4 year old Logitech cam that looks like a golf ball. I think he got it from a golfing event. Since he is now using a newer and much beefier PC with Windows 7 he felt he could shelve the golf ball and get a better cam.
We tried out a couple of models, but the C910 had the cleanest and clearest picture. We sat in his office and conferenced with each other (I had my trusty laptop) and he was using the new toys and we narrowed the choices down to 2 models the Logitech Webcam Pro 9000 and the C910. It was a close race but the C910 seemed to have a better processor and the picture clarity was crisp. The microphone was a big deal for this customer too. I can't blame him since it was his job to be clearly heard by others who are looking for his services. Both the Pro 9000 and the C910 had very good microphones and no matter what volume the user was speaking at there was no discernible crackle or squelch that you get with cheaper models. The Carl Zeiss lens isn't noticeable until you directly compare this cam with other brands, then the difference is clear (no pun intended).
This was the best web cam I have ever used and my customer was happy with its performance. If you are looking for a good webcam then please don't cheap out on yourself and get the $17 P.O.S. from the liquidators around the corner. Get something that offers your viewer a better representation of you. $50 to $80 will get you a very good cam. While you are at it, try to stick with a good name brand like Logitech. They have been making high quality cams since before the term WebCam was invented. Other brands may have some driver compatibility issues and may also not work with the major communications packages out there. I have worked on peoples computers that had all kinds of strange software issues and it turned out that the Lifecam software was wreaking havoc on their system. If you are in the market for a good WebCam then You Gotta Have the Logictech C910