M65x1 female to M42x1 male thread adapter for helicoids 38mm clamps This way you will need

This way you will need just micro adjusting after switching from one objective to another

Most usable camera for these lenses is Black Magic Pocket Cinema Camera (BMPCC)

It's purpose it to bring a lens 15mm further from the camera sensor to allow you shooting from closer distance

<p>This is more complex version of the adapter - you put the lens into it and secure it with turn of the bayonet nut

M65x1 female to M42x1 male thread adapter for helicoids 38mm clamps This way you will needFemale side M65x1 (used by Chinese focusing helicoids) Male side M42x1 (universal mount for Zenit Praktica) Max. diameter 69mm Distance between flanges 6mm Weight 22g This adapter allows using Chinese focusing helicoids on M42x1 cameras bellows. Can be used for other purposes if your lens has same mount thread. Made of anodized aluminium. For sale is the M65 to M42 adapter only. All other items are pictured just for reference.