1-10 Stop VND/CPL Filter: Provides exposure control with adjustable stops, enabling control over light & reflection with ND32 expand the range up to 10 stops. Filter Island: Use ND32, Soft GND 1.2, or Black Glow Mist filters individually or combined with the VND/CPL filter. (Only one filter fits in the filter island at a time.) Hybrid VND/CPL: The 2-in-1 feature lets you control light and reduce reflections from non-reflective surfaces. Adjust the ND by rotating the black ring, then fine-tune the polarization by rotating the red ring at the back. 67mm Thread Compatibility: By detaching the VND/CPL filter, you can thread any 67mm filter onto the lens, providing additional control and compatibility with a wide range of professional filters. Magnetic Quick Swap: This filter system is specifically designed for iPhone users with Freewell’s magnetic iPhone case and genius rig cage, ensuring a perfect fit. Freewell Pro Hybrid Magnetic Filter 1 to 10 Stop Variable ND/CPL with ND32, Soft Gradient 1.2, Black Glow Mist Compatible with Freewell iPhone Case & Cage