Kenko DG Extension Tube Set for Canon EF Prime Lens It also has a bunch

It also has a bunch of light effects accessible via app

The Nikon F2SB is one of Nikon's best cameras

ISO tops out at 400

There's a cool rotary diffuser system and bounce setting that tilts the tube from -7 to 90 degrees from horizontal

but worth it

Kenko DG Extension Tube Set for Canon EF Prime Lens It also has a bunchA set of three extension tubes for Canon EF 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. Compatible with EF and EF S lenses and cameras. In excellent condition.