1The lens adapter can allow for M42 mount lens to install on for Canon RF camera. 2Made of highquality alloy, sturdy and durable, cover is painted to prevent oxidation and corrosion. 3Precise processing, tight fitting, precise fitting and no light leakage, and it feels comfortable. 4The inner wall is treated with extinction to avoid the influence of reflected light on imaging. 5Almost the same as the original one, a good replacement. and it is not easy to slide when installed. Item Type:Lens Adapter Material: Alloy Color: Black Weight: Approx. 82.0g/2.9oz Mount: for M42 screw mount, for RF mount CompatibleLens: for M42 screw mount lens Application: for Canon RF mount camera , for Canon EOS R/RP/R5/R6 camera How to use: 1. Align the identification point of the lens mountwith the identification point of the adapter ring and rotate it clockwise. When you hear a "click" sound, it means the lens has been installed in place 2. Align the identification point on the lens adapter ring with the adapter ring to the identification point on the fuselage, and rotate clockwise when you hear a "click" sound, it means it is installed in place 3. Press and hold the camera lens release button and rotate it counterclockwise to remove the lens together with the adapter ring 4. Rotate counterclockwise, the adapter ring can be removed from the lens 1 x Lens Adapter 1 x Wrench