cleaned up camera-lens profiles

Did some SkyTools clean-up. Before deleting duplicate/extra telescopes, I moved associated log entries to the proper instrument. Made a telescope called the "tracking mount for photography" which I associated the DSLR with. Partly in deference to the barn door tracker. Mostly to have the camera and all the lens choices in one spot. I added the Rokinon 8mm lens to the camera profile. Changed the existing entry for the 18-55 kit lens so that it worked at f/5.6 when zoomed out, not f/3.5. Checked that the Vivitar Series 1 stays at f/3.5 when zoomed. Verified, after setting to piggyback mode, the field of view against past photos. Looks good!