This adapter is not compatible with full-frame cameras or the 650D, 700D. Although the lens will fit physically, automatic diaphragm, auto-focusing, or other electronic functions will not operate correctly when using this adapter. This is because the lens does not allow the camera body to control the aperture. You can use manual mode or aperture priority mode. For this inchAF inch adapter, auto focus functionality is not supported. The AF confirmation feature provides only an audible signal (beep) when manual focus is achieved. This adapter enables F AI lenses to be used on EF camera bodies such as the 5D, 7D, and 600D. It allows photographers to expand their photography capabilities by using legacy lenses on modern camera systems. Features: - Includes AF-confirm chip - EXIF data is recorded as 50mm f/1.4 - Supports AV (Aperture Priority) and Manual shooting modes - Fixed focus confirmation issues on 60D, 550D, and 7D models - Reprinted electrical contacts for improved connectivity - Allows use of AI and AF mount lenses on EF camera bodies - Aperture pin stop-down flange design - Compatible with macro rings and other accessories - Capable of focusing to infinity Material: Chrome-plated brass Color: Silver Mounting Instructions: Attach the adapter to the lens first, then mount the lens and adapter together onto the camera body. Removal Instructions: Remove the lens and adapter as a unit from the camera. Press the lens lock button and detach the adapter from the lens simultaneously. Package Contents: 1 x AF Confirm Lens to Camera Mount Adapter Note: Light and display differences may cause slight color variations between the product and the image. Measurement error is +/- 1-3 cm.