Why isn't the picture from my Logitech Webcam very good?

The picture from my Logitech Webcam is very poor. It is grainy as if the camera isn't getting enough light. There doesn't seem to be any adjustment to make the image better. Is there anything I can try?
Peter Nile, December 2003


done
its a logitec zoom webcvam and i dont no if ive updated the drivers

matt, May 2005
its a logitech quick cam express and yes i uploaded the drivers

jannah, March 2005
what knid of web came is it and have you up dated the drivers

matt, November 2004