This 52mm-NEX mount Macro Lens Reverse Adapter Rings is threaded on one side to fit the filter thread of your lens,the other side is mounted onto the E mount camera body.With the lens being reversed,it greatly increases the lens macro reproduction range capabilities,this saves your cost of buying an expensive macro lens for macro photography. Steps of use: 1.Take out your lens from your camera body. 2.Mount the adapter ring to your camera body. 3.Reverse your lens with 52mm thread and screw it to the adapter ring until it is tight. Note: Autofocus,automatic diaphragm (AE metering),and other functions dependent on communication between camera body and lens will be disrupted with this reverse ring mounting on the camera body. To properly use this lens reverse adapter ring, you have to meet the below two conditions: a.You have a E mount camera,below are some of the E mount cameras for your reference: Compatible with A6500 A6300 A5100 A6000 A5000 A3000 NEX-5T NEX-3N NEX-6 NEX-5R NEX-F3 NEX-7 NEX-5N NEX-5C NEX-C3 NEX-3 NEX-5 A7RIII A9 A7III A7 A7s A7R A7II A7RII A7SII b.You have a lens with 52mm filter thread, below are some of the lens(Mounts Any lenses with 52mm filter thread to a micro E-Series Camera) Advantage: 1. Further increase the distance between the lens and the focal plane; 2. It can achieve good results when shooting three-dimensional scenery; 3. Simple and cheap.  Disadvantages: 1. After reverse connection, the function of the lens focusing ring is very small, focusing mainly by moving the distance between the camera and the subject; 2. The camera 's aperture linkage system no longer works; 3. Short depth of field makes focusing difficult; 4. Only lenses with a focal length between 20mm and 85mm can be used; 5. The lens of the original lens bayonet part is completely exposed, and backlit shooting will cause glare Package: 52mm-NEX Reverse Mount Ring x 1pcs (Original Manufactory Package)