42.5mm to M52x1 thread adapter for helicoids Ring Adapter w/ Protection Circle
Female side - smooth 42.5 mm with copper eyepiece protection circle
Male side - M52x1
heigth - 10 mm(without thread)
Weight - 80 g
This adapter allows using projection lenses with 42.5mm rear diameter on focusing helicoids with M52x1 thread.
A lens is secured with 3 thumb screws. Intermediate flat sping protects a lens barrel from damage by screws.
Some compatible lenses are:
Braun ultralit pl
Isco projar/cinelux/ultra mc
and so on...
Adapter is made of anodized aluminium.durable