Features 1、Full manual operation, manual focusing, manual aperture adjustment, can achieve manual exposure with the body, aperture priority exposure. 2、Smooth surface, easy to assemble, exquisite workmanship, the combination with the mount is tight and smooth. 3、Inner wall paint spraying extinction treatment, not to reflect on the CMOS affect the imaging. 4、Made of high quality alloy, sturdy and durable, with anti-corrosion and anti-rust surface, can prolong the service life. 5、This adapter ring allows for Praktica PB mount lens to be mounted on for SONY NEX mount body, greatly increasing the lens suitability. Specification Condition: 100% Brand New Item Type: Camera Lens Adapter Ring Model: PB-NEX Material: Aluminium A Black lloy Color: Black Suitable Lens: for Praktica PB Mount Lens Suitable Camera: for Sony NEX Mount Body Quantity: 1PCS Weight: Approx. 76g Package List 1 x Camera Lens Adapter Ring