Feature:1. Specially designed replacement for Pentax PK645 lens to Fujifilm G mount cameras, like GFX100, GFX50S, GFX50R, GFX100S, etc.2. 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.3. Not affect cameras normal use, automatic diaphragm (AE metering) and other auto functions still work with this adapter ring.4. Made from high-quality metal, precisely machined, with well-plated surface, rust-proof and durable for use.5. For most cameras lens, it supports infinity focus for more professional photography, making your masterpiece distinguish from others!Specification:FeaturesSpecially 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!SpecificationsColor: BlackMaterial: MetalProduct Size: 8 * 6 * 5cm/ 3.1 * 2.3 * 1.9inchProduct Weight: 218g/ 7.6ozNoteThe camera and lens showed in the pictures are not included.Package List1 * Adapter RingPackage List:1 * Adapter Ring