Two-piece extension tube set for Nikon F brand_Kinoflo and some of the best

and some of the best lenses ever made- including the 45mm f2 Carl Zeiss Planar lens that comes with it

It's nice and compact

rotating viewfinder- helpful for low-angle or copystand work

You then turn the actual focus ring to match this setting

Mounts to 19mm and 22mm threaded viewfinders with the included adapters

Two-piece extension tube set for Nikon F brand_Kinoflo and some of the bestA generic extension tube set for the Nikon F mount, with 12mm and 20mm tubes. These tubes are obviously cheap, but functional, and they even communicate AI coupling, pin drive AF and electronic information. Don't expect an heirloom and you'll probably have a good time with these.