Hot Mirror Clip-in Filter For Sigma FP/BF L-Mount – Magnetic

Our Hot Mirror Clip-in Filter For Sigma FP/BF L-Mount – Magnetic deliver pro-level optical performance in a compact, convenient format. Mounted behind the lens, this system eliminates the need to buy multiple filter sizes for different lenses. Whether you’re shooting cinematic infrared, dramatic long exposures, or creative in-camera effects, you get the freedom to switch lenses without swapping filters. Each filter is crafted from Kolari’s premium optical glass and housed in a precision CNC-machined aluminum magnetic frame. Designed for maximum lens compatibility, they integrate seamlessly with your existing setup and can even be paired with front-mounted filters for added flexibility—all while preserving outstanding image quality.