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 Fujifilm FX X mount camera,below are some of the Fujifilm FX X mount cameras for your reference: Compatible with for Fujifilm FX X Mount X-A5 X-A20 X-A10 X-A3 X-A2 X-A1 X-T2 X-E3 X-E2S X-E2 X-E1 X-T100 X-T10 X-T1IR X-T1 X-T20 X-H1 X-M1 X-Pro1 X-Pro2 Camera | 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 FX X-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-Nik or 18-135mmf/3.5-5.6GIF-ED, AF-SNikkor28mmf/1.8G, AF-SNikkor35mmf/1.4G, AF-SNkkor85mmf/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, NikkorZ85mmf/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, Vario-Tess arT*FE 24-70mmf/4ZAOSS, E 18-200mmf/3.5-6.3OSS(SEL 18200), FE85mmf/1.8(SEL85F 18), 28-75mmf/2.8SAM(SAL 2875),