This interchangeable Canon EF-M mount fits only the Sirui 35mm F1.8 1.33x anamorphic lens with MFT mount – it is not an adapter. It replaces the lens mount, so the lens fits APS-C mirrorless cameras with Canon EF-M mount directly; on full-frame bodies, shoot in APS-C mode. The ring is held by the lens's four cross-head screws and located by a stop pin.
This interchangeable Canon EF-M mount fits only the Sirui 35mm F1.8 1.33x anamorphic lens with MFT mount – it is not an adapter. It replaces the lens mount, so the lens fits APS-C mirrorless cameras with Canon EF-M mount directly; on full-frame bodies, shoot in APS-C mode. The ring is held by the lens's four cross-head screws and located by a stop pin.
With the ring swapped, the Sirui 35mm anamorphic MFT lens mounts straight onto an APS-C mirrorless camera, with no adapter between body and lens.

Remove only the four cross-head screws that hold the mount. Do not remove the other fixed screws – this may damage the lens and void the warranty.
The pin on the ring locates in the hole on the lens mount, so the ring always sits in the right position.
On full-frame bodies, switch the camera to APS-C (Super 35) format.
The ring is made for Sony E, Canon EF-M and Nikon Z. Choose the version that matches your camera; if the ring does not fit your body, contact your dealer.

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