Nikon BR-2A reversing ring with 52mm thread.

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Nikon 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 aut ofocus cameras: it's machined a tiny bit thinner at certain spots on the mount to safely clear your camera's electronic contacts. Show more