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
- Type: Auto adapter ring
- For use with Nikon PB-4 and PB-5 bellows units
- Automatic aperture diaphragm control with the PB-4 and PB-5 bellows units when combined with the AR-4, AR-7 and AR-10 cable releases
– Rasheed Schoen
Very happy with this purchase