For sale is a Nikon 55mm F3.5K AI'd by John White in good condition. Blades are clean. Glass is too. Barrel has a few small marks but overall is in good condition. Includes caps. Also includes a Nikon M2 tube and a PN1 tube. Both in bargain condition. The PN1 has a built in tripod mount which is very useful when getting large magnifications. The M2 gets the combo to 1:1. The PN1 adds another 52.5mm to the 27.5mm of the M2. No caps. Price is $99 shipped to cont. US with paypal fees included. Note: The 55mm has been AI modified but the tubes have not. Do not use the tubes on a modern Nikon body without checking for compatibility.