1、Parameters can be set, after normal focus, there will be a focus prompt, supports exposure in aperture priority for AV mode and manual mode. 2、High‑quality alloy precise manufacturing, providing excellent operability and durability. 3、Compatible for Leica R lens and for Canon EF/EF‑S mount camera, let old cameras and lenses be used. 4、Fit for Canon 100D/1l00D/1000D/300D/350D/400D/450D/550D/600D/650D/700D/10D/20D/30D/40D/50D/60D/70D/5D/5DII/5DIII/6D/7DII. 5、Made of high‑quality alloy material, durable, corrosion‑resistant and wear‑resistant. Item Type: Lens Adapter Material: Alloy Color: As Picture Shown Weight: Approx. 22.0g/0.8oz Fit for Leica R Lens Fit for Canon EF/EF‑S Mount Camera Fit for Canon 100D/1l00D/1000D/300D/350D/400D/450D/550D/600D/650D/700D/10D/20D/ 30D/40D/50D/60D/70D/5D/5DII/5DIII/6D/7DII Support: Manual Iris Support: all kinds of digital and some film machines How to use: 1. Install the adapter ring on the lens: First put the corresponding lens on the slot of the adapter ring, align the white dot on the lens with the red dot on the front of the adapter ring, and then tighten it clockwise until it clicks, and it is installed in place . 2. Install the adapter ring and lens on the camera as a whole: Turn off the power of the camera, align the mounting interface of the adapter ring with the interface of the camera, and align the red dot on the rear of the adapter ring with the red dot of the camera lens interface. Then, rotate the adapter ring and the lens in a clockwise direction until it clicks, which is in place. 3. If you want to remove the adapter ring and lens from the camera, press the lens release button on the camera, and then rotate the adapter ring counterclockwise. Instructions for use of adapter ring: 1. First, set in the camera menu: Turn on "Shoot without lens" or "Release shutter without lens" to use the adapter ring. 2. Use LCD to focus, all are manual focus. 3. Use the MF zoom function, 7 times or 14 times zoom to focus, to achieve the focus function. 4. You can use M or A mode to shoot. 1 x Lens Adapter