Nikon PB-6 with PS-6 brand_Metz first of all

first of all

just in case you're not into making too much of a show of it

very light haze behind the front element

keeping the whole thing pretty trim for transport (but also restricting usable lenses to about 150-180mm focal length) Also included: a #0 lensboard and a fresnel screen

This tube will give you an additional 82mm- a substantial amount when combined with the RB's already impressive built-in bellows extension

Nikon PB-6 with PS-6 brand_Metz first of allThe NIkon PB 6 is a sturdy late model bellows with autodiaphragm operation and a built in stage focusing system. Accepts any Nikon F mount lens; the camera end is a standard F mount but practical compatibility will depend on the shape of your camera (some bulkier AF and digital cameras will require an additional extension tube not included to clear the back of the rail). In excellent condition, with PS 6 slide duplicator unit and double cable release.