Meike MK‑C‑AF4 Auto Focus Adapter Ring for Mount Cameras to EF EF S Lens Description: It will increase compatible lens choices for your camera. This adapter ring allows for mount camera to mount EF / EF-S lens. Featuring automatic focus function and it will bring better shooting performance. With 1/4" screw hole on the bottom, it supports you to mount it onto various tripods.  Features: It allows for mount camera to mount EF / EF-S lens. It owns automatic focus function and not missing each precious moment. The mounting interfaces with high precision will not do harm to your camera and lens. Easy to install with the red dot. It will click when the installation is finished. There is a 1/4in screw hole on the bottom, convenient for you to install it onto various tripods. Specification: Condition: Brand: Meike Material: Metal Color: Black Screw Hole: 1/4" Compatible Cameras: for Mount mirrorless cameras Compatible Lens: for EF / EF-S lenses Size(Dia * H): Approx. 7 x 3cm / 2.8 x 1.2in Weight: Approx. 98g Package Included: 1 x Adapter Ring * Other terms on pictures are not included.