Nikon PB-4 brand_Vivitar This is a rectangular metal

This is a rectangular metal hood intended for Konica 24mm and 28mm lenses with 55mm filter threads

your slide is mounted

"ergonomics"

which is also called the 16566

with some cosmetic wear

Nikon PB-4 brand_Vivitar This is a rectangular metalThe Nikon PB 4 is Nikon's most unique and versatile bellows, with front standard left right tilt and shift capabilities that are indispensable for making use of the limited depth of field in macrophotography. 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