The Hoya 72mm W12 Umber Color Conversion Filter with multi-coating is a precise optical accessory that adjusts the color temperature by 2200 Kelvin, corresponding to a shift of +120 Mired, giving images a warm, dark amber tone. It effectively corrects blue casts when using tungsten-balanced films like Cinestill 800T under daylight conditions and is also suitable for indoor shots with 5500 Kelvin light sources such as flash units or studio strobes. This filter provides a stronger warming effect than the W10 model and achieves a more neutral appearance with standard tungsten films. The construction with Hoya's multi-coating technology minimizes reflections, reduces lens flares and ghosting, and ensures an average light transmission of over 97 percent for improved compatibility with multi-coated lenses. The robust glass construction ensures consistent color accuracy and image quality, making it a reliable tool for photographers seeking professional results in various lighting environments. With a 72 mm thread, it is easy to mount and use, contributing to enhanced optical performance without compromising clarity or detail fidelity.