b' Make m42 mount lenses can be used in for EF camera body. With AF-Confirm Most Recent 3rd Generation Chip. EXIF is fixed 50mm f2.0. Activate camera viewfinder for focus light confirmation and sound. Supports AV (Aperture Priority) and Manual Mode. The exposure aperture data can be recorded in EXIF FORMAT. It will give you the confirmation signal once PARA is focused target accurately. This is an opening pin stops down flange version. It is possible to use the Macros rings and other accessories. Can help you to improve the success stem relationship. Leave FOR the for infinity for focus manually. Material: Copper - aluminum - magnesium alloy Size: 65 x 9MM/2.56 x 0.35 Color: Black. Compatible: digital cameras: 500D, 1000D, 450D, 400D, 350D, 300D, 50D, 40D, 30D, 20D, 10D and 5D, etc. Quantity: 1 PC Notice: Although the lens physically fit, auto iris, auto-focus, or no other functions will not function properly while using this adapter. In this for case, since the lens does not have the capability to make its aperture control by the body of the camera. You can shoot with manual mode or aperture priority mode. For this adapter Confirm for AF, it does not mean that you can use the auto for focus, it only has an indication (bee sound) when manual to really for focus. Note: 1. ONLY Adapter, not included other. 3. Due to the different monitor and light effect, the actual color of the item might be slightly different from the color showed on the pictures. 4. Please allow 1-5mm measuring deviation due to manual measurement. Package includes (No Retail Packagege ) : 1 x for AF Confirm M42 Lens to Adapter'