We were in the photonics lab this week playing with various lasers and getting a strange result with one of our measurements of a spinning disc. Someone suggested that the disc may not be flat, but we had no equipment to find out if it really is or not. Enter our local lens collector in the lab with his brilliant idea. One of the guys in the lab has a huge lens collection among which was a Canon T mount CCTV lens a 85mm f/1.8 I think it was. So while he ran to the workshop to have them quickly lathe out an adapter allowing us to mount the lens on standard Thorlabs optoelectronics equipment another guy dismantled a webcam. The lens was mounted onto a standard mount with about 5 extension pieces and the webcam mounted in the back. Volah! an almost microscope level imaging system, and probably the sharpest webcam in the southern hemisphere too. We mounted a needle next to the spinning disc, focused on the tip of the needle (the needle itself now good 4cm across on the screen, put the needle almost touching the rotating disc, and shone a light at the contraption at 45 degrees. We measured the non-uniformity of the disc by how far the shadow moved on the resulting video. Theory proved, problem solved, beers drank. Has anyone else ever found a cool alternate use for their camera gear?