Exact compensation of the flange focal length difference of the two mounts
Connected lenses can be manually focused up to infinity
No information transmission between the lens and the camera
Exposure metering in aperture priority mode or manually
The M42 x 1 Lens to Canon EOS Body Lens Mount Adapter from NOVOFLEX allows a M42 x 1 lens to be mounted to a Canon EOS SLR camera. Although the lens will fit physically, automatic diaphragm (AE metering), or any other functions are not retained using this adapter. In this case you will need to meter in "stop-down mode" since the lens does not have the ability to have its aperture controlled by the camera body.