Features:
There is no ROM connection on the ring so diaphragm control of the lens is set manually.
Please installing / uninstalling the adapter after turning off the camera.
It is possible to use macro rings and other accessories.
It cant focus to infinity, just for macro shooting
Macro shooting is difficult, please set to maximum aperture to facilitate focusing, turn the focusing ring to complete focusing, then adjust the aperture properly to obtain satisfactory depth of field

Specifications:
Material: Aluminum Alloy
Color: Black
Hole Diameter: 25mm
Lens: 16mm C mount lenses
Camera: for Canon EOS EF mount cameras

Package include:
1x Lens mount adapter