Features Specification Features： Specially designed replacement for Pentax PK645 lens to G mount cameras, like GFX100, GFX50S, GFX50R, GFX100S, etc. Both of sides can fit well with lens and camera, no gap and no wiggling, easy to install, can be easily removed when not in use. Not affect camera's normal use, automatic diaphragm (AE metering) and other auto functions still work with this adapter ring. Made from high-quality metal, precisely machined, with well-plated surface, rust-proof and for use. For most cameras lens, it supports infinity focus for more professional photography, making your masterpiece distinguish from others! Specifications： Color: Black Material: Metal Product Size: 8 * 6 * 5cm/ 3.1 * 2.3 * 1.9inch Product Weight: 218g/ 7.6oz Note： The camera and lens showed in the pictures are not included. Package List： 1 * Adapter Ring Package List 1 * Adapter Ring