lifecam hd 3000

Hi I’m pretty new to this and not very tech savvy. I have 2 web cams , a Microsoft lifecam 3000 and a lifecam 5001. I have added them to different scenes and one only seems to work at a time. so if scene1 (3000) works but I switch to scene2 (5001) it’s a black screen. But if I press the on...

I am using a Microsoft Lifecam HD 3000 on my macbook air and it is giving me a very low FPS-everything is really blurry when I do any fast movements. Also, the lighting is too bright and it is hard to see anything. It is also rather fuzzy. Should I just buy a new, more expensive webcam if I...