OCT-18 lens to M65x1 male thread adapter for helicoids

• Front side - OCT-18 mount (simplified)
• Rear side - M65x1 male thread

Machined from high quality aluminium alloyWhy aluminium?.

This adapter allows using OCT-18 lenses on Chinese focusing helicoids with M65x1 thread.

Length of the adapter is appropriate to reach infinity ficus in the following setup:

• OCT-18 lens
• OCT-18 - M65x1 male thread adapter (this item)
• M65x1 female to M65x1 male helicoid with 17-31mm extension range (we don't sell them)
• M65x1 female thread to Nikon Z camera mount adapter (available from us separately)
• Nikon Z camera