M42 to M42 mount lens Adjustable Focusing Helicoid Adapter 25mm to 55mm 25-55mm macro lens the continuous and upgraded of

the continuous and upgraded of Minima

For using Olympus OM mount lens with C mount (1 inch screw) 16mm format film devices

It can be used for macro photography only

For using Olympus Evolt series Four Thirds 4/3 mount DSLR cameras with all M42 (42mm x 1

86in Size of controller (mm/in): 155mm x 110mm x 53mm

M42 to M42 mount lens Adjustable Focusing Helicoid Adapter 25mm to 55mm 25-55mm macro lens the continuous and upgraded ofThis focusing helicoid tube is made with standard M42 mount and is made with light weight alloy. (Optional M39 M42 adapter ring for M39 lens) The length of this helicoid tube 25mm (min) to 55mm (max), intended for macro photography. You can adjust the focal length by adjusting the helicoid ring. Plate rings for helicoid rings on mirrorless cameras are available (sold separately).