Specification: ■ Brand new ■ Material: Aluminum ■ Color: Black ■ EXIF is fixed 50mm 4 ■ Allow to focus infinity in manually ■ With Newest 3rd generation AF-Confirm Chip ■ Support AV (Aperture Priority) and Manual Mode ■ Exposure aperture data can be recorded in EXIF ■ It can help you improve success shoot ratio ■ It is an aperture pin stop down flange version ■ It is possible to use Macro rings and other accessories ■ Enable camera viewfinder focus confirmation light and sound ■ Give you confirmation signal once you focus objective accurately ■ Make M42 mount lenses can be used on EF camera body Attentions: ■ Although the lens will fit physically, automatic diaphragm, auto-focusing, or any other functions will not operate correctly while using this adapter ■ In this case since the lens does not have the ability to have its aperture controlled by the camera body, you can shoot with manual mode or aperture priority mode ■ For this "AF Confirm" adapter, it is didn't mean you can use auto focus, it only have an indication (bee sound) when you manual focus actually Package Included: ■ 1x M42 Ring Adapter Note: ■ Please allow minor error due to the hand measurement. ■ The colors may be a little difference for the different monitor display.