1、Manual Type: All manual operating type, you need to do the job of manual focus, manual aperture adjustment to get the satisfying picture effect. 2、Other Function: Can achieve manual exposure, aperture priority exposure, infinity zoom with the camera body, providing satisfying experience. 3、Aluminium Material: Made of high quality aluminium alloy material with anodic oxidation process and fine workmanship, wear resistant, long service life. 4、Comfortable to Use: Can be tightly and smoothly combined with lens mount, easy to install and remove the lens with fluent process, comfortable to use. 5、Warm Prompt: There are no electronic contacts on the adapter ring, so auto focus is not supported, please make sure you do not mind this before ordering.