B+W 1102774 43mm Basic IR Black 093 Filter

The B+W 43mm Basic IR Black 093 filter is a specialized optical filter designed for infrared photography. It works by blocking nearly all visible light while transmitting infrared wavelengths at approximately 830nm and above, allowing your camera's sensor to record only the infrared spectrum. The result is striking, otherworldly images where green foliage glows white, blue skies turn near-black, and the overall scene takes on a surreal, high-contrast quality. This characteristic rendering—known as the Wood effect—has been a hallmark of infrared photography since the film era, and the 093 filter is one of the most effective ways to achieve it digitally.

Built with B+W's optical glass and housed in a black knurled metal mount, the filter threads smoothly onto any lens with a 43mm filter diameter. Because the filter is visually opaque, photographers need to compose and focus their shot before mounting it, or rely on a camera's live view if the sensor has sufficient IR responsiveness. On unmodified cameras, exposure times typically range from several seconds to minutes, so a solid tripod and remote shutter release are practical necessities. Photographers working with full-spectrum converted cameras will find the filter far more responsive, with exposures approaching normal handheld speeds. The 43mm size is well-suited to compact prime lenses often used on mirrorless bodies, and step-up rings can adapt it to larger filter threads if needed.