M32.5x0.5 female to M39x0.75 male thread adapter with retaining ring

• Front side - M32.5x0.5 female thread
• Rear side - M39x0.75 male thread
• Retaining ring with M39.075 female thread

Made of high quality aluminium alloy.

This adapter allows using Copal #0 shutter on Copal #1 lens boards.