Take out your lens from your camera body. | Mount the adapter ring to your camera body. | Reverse your lens with filter 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 EF M mount camera,below are some of the EF M mount cameras for your reference: Compatible with EF Mount Mirrorless Camera M1 M2 M3 M5 M6 M10 M50 M100 camera | b.You have a lens with 58mm filter thread, below are some of the lens | Compatible with For Nik 58mm Lens: AF-SNikkor35mmf/1.8GED, AF-SDX Nikkor 55-300mmf/4.5-5.6GEDVR, AF-S50mmf/1.8G, AF-PDX Nikkor 70-300mmf/4.5-6.3GEDVR, AF-SNikkor50mmf/1.4G, AF-PDX Nikkor 70-300mmf/4.5-6.3GED, AF 28-80mmf/3.3-5.6G, AF-SNikkor50mmf/1.8G, | Compatible with EF 58mm Lens: EF 22-55mmf/4-5.6USM, EF 100-300mmf/5.6L, EF 75-300mmf/4-5.6IIUSM, EF-S 18-55mmf/3.5-5.6ISSTM, TS-E90mmf/2.8, EF 90-300mmf/4.5-5.6USM, EF-S 18-55mmf/3.5-5.6IS, EF 28-105mmf/3.5-4.5IIUSM, EF-S 55-250mmf/4-5.6ISSTM, EF-S 18-55mmf/4-5.6ISSTM, EF100mm/2USM, EF28mmf/2.8ISUSM, EF-S 55-250mmf/4-5.6ISII, EF-S 18-55mmf/3.5-5.6, EF 28-90mmf/4-5.6Ⅲ, EF 28-80mmf/3.5-5.6IVUSM, | EF 70-210mmf/4, EF28mmf/1.8USM, EF100mmf/2.8USM, EF-S 18-55mmf/3.5-5.6ISII, EF 70-300mmf/4.5-5.6DOISUSM, EF 75-300mmf/4-5.6I, EF50mmf/1.4USM, MP-E65mmf/2.81-5X, EF85mmf/1.8USM, EF 100-300mmf/4.5-5.6USM, EF24mmf/2.8ISUSM, EF 28-105mmf/4-5.6USM, EF-S 18-55mmf/3.5-5.6IIUSM, EF-S 55-250mmf/4-5.6IS,