I found a lens at a pawn shop this weekend. It was a canon 70-200 F/2.8 L USM. My heart began to race immediately. Every one of these I've ever tracked on ebay went off at way over $1000, and here this one sat for $450. After asking about it, the manager said she'd take $200.
Upon closer inspection, the lens has been dropped. The filter ring is bent in on one side. They had a canon camera in the same case so I asked if I could hook them up, and check functionality. There was no battery in the camera, so I couldn't verify functionality of the autofocus. I didn't, however, notice any problems with the optics.
Upon even closer inspection, I noticed that on the back side of the outer lens, in the same area where the filter ring was bent, the edge of the lens was chipped. This is on the inside. I took the camera and lens over to the well-lit front window, expecting the sunlight to show me some flare where the chip was located. I tried various angles, looking through the viewfinder. Nothing
Here's my question: Is it possible, since we are using a digital rebel XTi, which inherited the 1.6 cropping factor, that a chip on the periphery of a lens would not matter to an XTi?