Nikon Speedlight SB-800 variable with reliable development in 10-15

with reliable development in 10-15 minutes

This helicoid extension tube lets you seamlessly adjust magnification for close-up work with your Pentax 67 and nearly any Pentax 67 lens (not included)

Note that this is not the standard 39mm lens thread: it's M50x0

and practical also

and the unusual spherical aberration control ring allows more control over image quality

Nikon Speedlight SB-800 variable with reliable development in 10-15The Nikon Speedlight SB 800 is a professional on camera flash that provides full manual control on or off camera, plus full TTL cabability on Nikon DLSRs. The SB 800 has a tilting swiveling zooming head, a PC sync connector, and Commander capability with compatible cameras and Speedlights. Some cosmetic wear, good function. Includes case, diffuser, and "5th battery" compartment.