Kenko DG Extension Tube Set for Nikon F collectible diaphragm blades have some fluid

diaphragm blades have some fluid and wear that won't impact function

designed for earlier Nikon cameras like the F/F2 Photomic and many Nikkormats

and the push-pull design makes it easy to zoom and focus at the same time

not just a 6x6 back with a mask: you'll get 16 shots per roll

with minor surface wear and light internal dust

Kenko DG Extension Tube Set for Nikon F collectible diaphragm blades have some fluidA set of three extension tubes for Nikon F mount: 12mm, 20mm, and 36mm. These tubes have the electronic contacts necessary to maintain autofocus and autoexposure capabilities. If you're curious about dabbling in macro work, this is an inexpensive way to get started.