About the ProMaster 77mm Macro Ring P-Series - 7529
The ProMaster Macro Ring P is used to mount the ProMaster RL60 LED Ring Light to the front of a lens for macro photography. The Macro Ring P is also compatible with Cokin P series mounting rings. *Note: this is for 77mm attachments.
0001139192| Leica Noctilux-M 50 mm f/0.95 ASPH Black Lens Anodized Finish (11602)