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SOM Berthiot Cinor 40/3.5

Aerial gun sight. Black over brass body. Unknown thread mount – perhaps M39

Category: 35mm+ Cine

Specifications
Reviews

Dimensions	40 mm
Focal Length (mm)	40
Max Aperture (f)	3.5
Min Aperture (f)	16
Aperture Blades	10 (Circular)