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 for Canon EF-ES mount camera,below are some of the EF-ES mount cameras for your reference: Compatible with for Canon EF-ES mount 1D,1DS,Mark II,III,IV,1DC,1DX, D30,D60,10D,20D,20DA,30D,40D,50D,60D,60DA,5D,Mark II,Mark III,7D,Rebel XT,XTi,XSi,T1,T1i,T2i,T3,T3i,T4,T4i,C300,C500 | b.You have a lens with 67mm filter thread, below are some of the lens(Mounts Any lenses with Ø 67mm filter thread to a EF-ES mount-Series Camera) | Compatible with For Canon 67mm Lens: EF 70-300mm/4-5.6LISUSM EF 70-200mmf/4LUSM EF-S 10-18mmf/4.5-5.6ISSTM EF 70-300mmf/4-5.6ISUSM EF-S 18-135mmf/3.5-5.6ISSTM EF35mmf/2ISUSM EF 70-300mmf/4-5.6ISIIUSM EF 70-200mmf/4LISUSM EF 24-85mmf/3.5-4.5USM EF-S 18-135mmf/3.5-5.6ISUSM EF100mmf/2.8LISUSM EF-S 17-85mmf/4-5.6ISUSM EF-S 18-135mmf/3.5-5.6IS | Compatible with For Nikon 67mm Lens: AF-SDX 18-70mmf/3.5-4.5GIF-ED AF-S 70-300mmf/4.5-5.6GIF-E DVR AF-SDX Nikkor 16-85mmf/3.5-5.6GEDVR Nkk or 18-140mmf/3.5-5.6GEDVR AF-SDX Zoom-Nikor 18-135mmf/3.5-5.6GIF-ED67mm AF-SNikkor 28mmf/1.8G AF-SNikkor 35mmf/1.4G AF-SNkkor 85mmf/1.8G AF-S 24-85mmf/3.5-4.5G AF-P Nikkor 70-300mmf/4.5-5.6EEDVR AF-S Nikkor 70-200mmf/4GEDVR Nikkor Z 85mmf/1.8S AF-SDX Nikkor 18-300mmf/3.5-6.3GEDVR AF-SDX Nikkor 18-105mmf/3.5-5.6GEDVR | Compatible with For Sigma 67mm Lens: 16mmf/1.4DCDN 35mmf/1.4DGH SMArt 100-400mmf/5.0-6.3DGOSHSM Contemporary 35mmf/1.4DGH SMArt 18-50mmf/2.8-4.5DCOSHSM 18-50mmf/2.8EXDC APO 50-150mmf/2.8IIEXDCHSM Compatible with For Sony 67mm Lens: EPZ 18-200mmf/3.5-6.3OSSLE(SE LP 18200) 18-135mmf/3.5-5.6SAM FE 24-70mmf/4ZAOSS E 18-200mmf/3.5-6.3OSS(SEL 18200) FE85mmf/1.8(SEL85F 18) 28-75mmf/2.8SAM(SAL 2875)