Hoya S-77INTENS 77mm Intensifier Filter

The Hoya S-77INTENS 77mm Intensifier filter is a purpose-built tool for photographers who regularly shoot under light-polluted skies. Constructed from specialized Didymium glass, the filter selectively absorbs the yellow-orange wavelengths emitted by sodium and mercury vapor street lights—the most common sources of urban skyglow. This targeted absorption allows stars, the Milky Way, and auroras to stand out with greater contrast and truer color, reducing the washed-out appearance that plagues long-exposure night photography near populated areas. Beyond astrophotography, the filter also intensifies warm tones in landscape and nature scenes, adding depth to autumn foliage, sunsets, and earth-toned subjects.

Hoya's multi-layer coating ensures that the filter maintains over 97% light transmission, so the impact on exposure time is minimal even during long night captures. The slim black aluminum ring keeps the overall profile low enough to avoid vignetting on ultra-wide-angle lenses and permits stacking with polarizers or protective filters. For photographers who want cleaner results straight out of the camera and less time correcting color casts in post-processing, the Intensifier filter offers a practical, optical-quality solution that screws directly onto any 77mm-threaded lens.