Description: brand new and high quality. Feature: Made of high-quality aluminum material, durable, firm and stable for us to use. This is an adapter ring mount which allows use of M42 lenses on any for Pentax PK mount SLR or DSLR camera body which is for for AF lenses. for for Pentax K-S1 K-3 K-50 K-5 II K-5 IIsK-30 K-01 K-5 K-r K-x K-7 K-m K20D K200D K10D K100D Super. Remove both lens/adapter together from the camera, press the lens lock and then remove the adapter from the lens simultaneously. Mount the Lens onto the adapter and then mount them onto the camera. There is no ROM connection on the ring so diaphragm control of the lens is set manually. Adapter Ring only, other accessories demo in the picture is not included! Specifications: Item Type: Adapter Ring Material: Aluminum Alloy Size: Outer Diameter: 51mm/2in Color: Black Quantity: 1 Pc Note: No retail package. Transition: 1cm=10mm=0.39inch Please allow 1-3mm error due to manual measurement. pls make sure you do not mind before you bid. Due to the difference between different monitors, the picture may not reflect the actual color of the item. Thank you! Package Includes: 1 x Adapter Ring