Yep check previous posts, I use a cheap Celestron USB Microscope, works really well for close up photos of varities, RPM, DD, etc., the quality of the photo isn't great, but sure helps my old eyes to see what I'm looking at on a big monitor now days. After 40 my eyes seem to change prescriptions every 8 months.
"Buy the Book Before You Buy the Coin" - Aaron R. Feldman - "And read it" - Me 2013! ANA
Life Member #3288 in good standing since 1982, EAC Member #6202, NBS Member, 2¢ variety collector.