Formatt Hitech IR Pass filters are a deep red/black color filter designed to filter out all visible light below 650nm. When used on a standard digital imaging sensor shot in monochrome mode, the 650nm pass filter creates a surreal image where black colors are rendered a deep rich black and highlights are all turned bright white. If a color mode is used on a standard digital sensor, a deep red image results. Due to the extreme stop loss of this filter, a slow shutter speed must be used to obtain correct exposure.
