Item Type: Lens Converter Ring Material: Aluminum Alloy Weight: Approx. 76g / 2.7oz Applicable Lens: For M39 Mount Lens Applicable Bodies: For Z Mount Cameras, Z6 Z7 Z50 Z 5 Z6II Z7II Zfc Z9 Z30 1High Adaptability: The lens converter can make the M39 mount lens compatible with Z Mount camera system, including for Z6 Z7 Z50 Z 5 Z6II Z7II Zfc Z9 Z30 and other cameras. 2Perfect Fit: The product is perfectly fitted to the camera and lens at the bayonet, tightly combined, easy to install and remove. 3Exquisite Workmanship: The product is made of aluminum alloy, anodic oxidation process, exquisite workmanship, solid. 4Multifunction: Support full manual control, manual focus, manual exposure, aperture priority, matte paint, can focus at infinity. 5Practicality: Increased versatility and options for photographers, can help photographers take a variety of different effects of photos and videos.The adapter ring is a manual adapter and is not equipped with electronic contacts, which will lose the function of powering the lens after installation, so the lens functions that depend on electronic messaging with the camera body (autofocus, AE metering, image stabilization, etc.) will be disrupted and need to be manually reset1 x LensConverterRing