【Fits 52mm Magnetic ND / CPL Filters】The SmallRig 3840 adapter provides a professional and secure solution to shoot with magnetic filters. It fits 52mm ND magnetic filters and features a quick-release design for easy installation.( ❗Note: Not compatible with all threaded filters and VND magnetic filters) 【For iPhone 15/15 Pro/15 Pro Max/14/13/12 Pro/12 Pro Max/11 Series】This adapter is compatible with phone cages or cases with an M Mount, such as SmallRig 4077, 4075, 3561, 3562, 3734, etc. (Note: Not compatible with iPhone 12) 【No Impact on Phone Operations】The 52mm magnetic filter adapter does not block the phone's original lenses or affect the way other functions work, such as Ultra Wide, Wide, Telephoto, Lidar, and Flash. 【Quick and Easy Filter Changes】The adapter ring 3840 can magnetically and quickly secure varied filters according to your needs for light. You can also choose SmallRig 3839, which is a 67mm Cellphone Magnetic Filter Ring Adapter with M Mount. 【Easy to Install】 The adapter ring shall be mounted onto the upper left lens mount for iPhone 12、13 series. Be care of its orientation.