Tiffen 43SHM 43mm Standard Hot Mirror Lens Filter

The Tiffen 43mm Standard Hot Mirror is a specialized optical filter designed to combat a common but often overlooked issue in digital photography: infrared light contamination. Many digital camera sensors have some sensitivity to near-infrared wavelengths, which can bleed through the lens and cause unnatural warm casts, reduced contrast, and inaccurate color reproduction — particularly in outdoor and high-intensity lighting conditions. The 43SHM works by reflecting the majority of infrared light before it reaches the sensor, allowing only visible wavelengths to pass through and produce cleaner, more faithful color in your images.

Built by Tiffen in the United States, this filter features a 43mm thread size that screws directly onto compatible lenses. It is a practical solution for photographers who have noticed persistent reddish or magenta shifts in their work and traced the issue back to their camera's insufficient built-in IR filtering. Because it targets infrared rather than visible light, it has minimal impact on exposure, making it a subtle but meaningful addition to the optical chain for affected camera systems.