Nippon Kogaku 600mm f9 APO-Nikkor in 5.5" Sinar board  type_Colour Slide and there's probably a reason

and there's probably a reason for that

Interior dimensions are approximately 7x4

It’s still totally workable

all-metal crank elevator centre column assembly for select Gitzo Systematic tripods (or similar)

Hasselblad Winding Knob for V series cameras with interchangeable winders

Nippon Kogaku 600mm f9 APO-Nikkor in 5.5" Sinar board &nbsptype_Colour Slide and there's probably a reasonThe Nippon Kogaku 600mm f9 APO Nikkor is a barrel lens (without shutter) that covers up to 11x14". In excellent condition, with minor internal dust and light cosmetic wear. Diaphragm blades are even, though a few have light oil which does not affect function. The flip away lens cap holds well, though only one spring clip is present. The lens is threaded into a custom 5. 5" Sinar compatible board.