If the image is slightly blurred, you can turn to the front of the lens and thus the whole bit Sharpen (annoying when you can not find anything about it.)
The 6 LEDs are in continuous operation ie when the webcam is not "addressed" by a program shine this anyway and are really loud and bright, there is a small wheel with which you can set this brightness only good is my opinion garnix.
But what was mentioned at the beginning of a short solution for small money.
