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Review Summary
• The BR-2A enables you to mount a 52mm front thread lens in reverse on the PB-6 and Nikon cameras. This increases magnification and working distance.
• BR-3 provides a 52mm thread for filters and other lens attachments with lens in reverse.
• BR-5 allows mounting lens with 62mm thread (use with BR-2A).
• The BR-6 is for the PB-4, PB-5 and PB-6. It enables the Nikkor lens auto-diaphragm to be controlled with the AR-4, 7 and 10 cable releases.