67mm to M65x1 thread adapter (for Buhl f/2.5 7-inch lens)

• Front side - smooth, 67 mm inner diameter
• Rear side - M65x1 male thread
• Max. diameter - 78 mm
• Distance between flanges - 20 mm
• Weight - 85 g

This adapter allows using projection lenses that have 67mm barrel diameter (like for Buhl f/2.5 7-inch lens) on Chinese focusing helicoids with M65x1 screw thread. Such setup is great for portrait and macro shots.

The adapter is secured by 3 of M5 screws. Intermediate flat spring prevents a lens barrel damage.

Made of anodized light alloy (aluminium 6061 or D16T).