APEX CM-HB100CPL HB100mm HD External Macro Lens with CPL 1. Focal distance: 50mm 2. Lens composition: 5 pieces and 4 groups 3. Suitable for most smartphones, easy to operate 4. The effective focusing distance is 4-7 nuts, shooting small objects 5. Suitable for shooting flowers, plants, insects, jewry, food, beauty makeup, details of life, small objects, etc. 6. Multi-group optical structure design, clear imaging, no distortion 7. The long-distance macro lens can effectivy focus at 4-7 cm, which can effectivy increase the close-up angle of view of the mobile phone 8. Dimensions: Interface M17xP0.75, 66 mm before the clip stretches, and 95 mm after stretchingInstallation steps: 1. The stretch clip is fixed on the phone 2. Make sure the hole in the middle of the clip is aligned with the phones main camera 3. Screw the CPL filter into the macro lens 4. Insert the clip clockwise into the 17mm threaded port