$299 自由飞 (Freewell) Freewell Ultra-Slim Locking 滤镜 System (49-95mm) Modular magnetic quick-locking ultra-slim filter ecosystem for 49mm to 95mm lens threads 49-95mm
$30 K&F CONCEPT K&F Concept 磁性 CPL + ND16/ND64/ND256 滤镜套件,适用于 DJI Osmo Pocket 3 Osmo Pocket 3 上有四个磁性滤镜,可实现更好的眩光控制和曝光管理。