Focal Length Identifying with a Click Focal Length Dial. Uses a click focal length dial, it can better avoid changing the focal length on the dial by mistake during the use.When using a lens without the 6Bit contact, the focal length dial needs to be set to be consistent with the focal length of the lens. Press the reset button to record the focal length information
Aperture data recording. Set the same aperture data as the current aperture of the lens on the camera, and the aperture data of the manual lens will be recorded in the EXIF information. *The switching of aperture data needs to be done manually on the lens, not on the camera. *Aperture data is determined by the camera body. If there is no corresponding aperture in the camera, it cannot be set to the aperture data of the lens.