Manfrotto 268 brand_Sekonic the camera mount is the

the camera mount is the standard 1/4"

The Nikon 800mm f5

These a re manual tubes: there is no stop-down mechanism built in

but are in overall great condition

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)

Manfrotto 268 brand_Sekonic the camera mount is theThe Manfrotto 268 is a very large, heavily built all metal ball head suitable for well, big stuff. In excellent functional condition, though a previous owner has drilled a few mounting holes in a (non structural) section of the top plate you can see those in the picture. They won't affect function in any way. Otherwise, cosmetic condition is excellent, with only minor paint wear. Be aware that this head weighs nearly 2kg by itself, so it may not be