Nikon BR-2A reversing ring with 52mm thread. brand_Pana-Vue Interior dimensions are approximately 40

Interior dimensions are approximately 40

but not perfect

does not include caps

with only minor cosmetic wear from light use

The Nikon DR-6 is a right-angle viewfinder for cameras with a slip-on viewfinder eyepiece mount (like the D750 and D610)

Nikon BR-2A reversing ring with 52mm thread. brand_Pana-Vue Interior dimensions are approximately 40Nikon BR2A reversing ring with 52mm thread Nikon F mount. Allows you to flip your 52mm threaded lens around backwards for close up work. This "A" version is designed for use on autofocus cameras: it's machined a tiny bit thinner at certain spots on the mount to safely clear your camera's electronic contacts.