Nikon TC-20E air This complete kit includes two

This complete kit includes two heads

Allows you to flip your 52mm-threaded lens around backwards for close-up work

(Image is not of actual object

Fuji went out of their way to make this one a bit weird: it has thumbwheel focusing

Flic Film B&W Cine Film Developer is a low contrast developer for any black and white film- but designed for cine films like Kodak Double-X and Lomo Potsdam/Berlin

Nikon TC-20E air This complete kit includes twoThe Nikon TC 20E is an autofocus teleconverter designed for select Nikon AF I and AF S telephoto lenses (here's Nikon's product page with details). Doubles focal length of compatible lenses, at the cost of two stops of light. In excellent condition, with very minor cosmetic wear.