Well I have completed some extensive lens testing with my Canon D60 and am narrowing my lens selection down a bit. All of these lenses are in decent shape and are quite usable. No lens caps unless pictured. In a lot of cases, my choice was to keep a good T-mount lens over an equally good M42 mount lens. In a few cases, I ended up with two identical lenses, and some just weren't as good as the others in my collection. These are all M42 Pentax/Universal screw mount lenses. Adapters can be purchased for $10-$15 that will make them work with Canon FD, Canon AF (EOS), Yashica, Contax, Pentax K, Minolta, etc. Nikon adapters are available, but need a relay lens to reach infinity focus and cost around $100. These are easily adaptable to most CCD cameras and are perfect for use with starlight express cameras.
This lens is a Zenit Helios f/2.0 58mm. Has some light scratches in coatings and some dirt specs trapped on the outer edges of an internal lens element. MIght be flaking paint?!? I actually really liked this lens, but the focus ring is stiff to turn, so I purchased another identical lens to replace it. Everything works and it takes good pictures, even with the stiff focus movement. Asking $20 shipped.
1/4" CCD 6.3*
1/3" CCD 8.6*
1/2" CCD 12.6*
1" CCD 25.1*
I prefer Paypal or postal money orders. I have several lenses listed so check them all out.
P.S. The red fringes on the right side are from dark current in the D60.