Low profile M12 to CS lens adapter This is archived post, see new version on new platform. Low profile M12 to CS lens adapter M12-TO-CS-ADAPTER was designed for wide-angle and fisheye lenses. These lenses typically feature a compact design and have a short back focal distance. The installation, however, can be slightly tricky as access to the M12 set screw is restricted. Below is recommended installation steps: 1. Prepare M12 to CS lens adapter. 2. Install adapter. 3. Adapter should be flush with the camera flange. Do not tighten nor use the set screw yet. 4. Prepare M12 lens. 5. Connect the camera for live preview and install M12 lens. Adjust lens focus. 6. Twist M12 lens half-turn (or a bit more) clockwise (deeper into the camera). This is an important step. In the final installation step, it will give some room for final focus adjustment. 7. Unscrew the filter from the camera without touching the lens. 8. Install and tighten set screw. 9. Lens is now secured in the filter. 10. Install lens with filter into the camera. 11. Small gap should be left for focus adjustment. 12. Install set screw while verifying sharp focus on camera live preview software. 13. Lens is secured and ready for use.