Tiffen 6747 67mm #47 Blue Black & White Filter

The Tiffen 6747 is a 67mm-threaded #47 dark blue filter engineered for black and white photography. In monochrome imaging, colored filters work by selectively transmitting and blocking different wavelengths of light, which alters how colors translate into shades of gray. The #47 sits at the deep end of the blue spectrum, meaning it passes blue light freely while heavily absorbing reds, oranges, and yellows. The result is that blue skies and blue objects render as lighter gray tones, while warm-colored subjects — skin, foliage, brick, earth — go noticeably darker. This creates a striking, sometimes surreal tonal separation that is difficult to replicate in post-processing.

Beyond basic contrast manipulation, the #47 is valued for its ability to accentuate atmospheric haze and fog, making it a useful creative tool for landscape and fine-art black and white work. It also has technical applications in dye transfer printing, where precise color channel separation is required. Because of its deep density, photographers should expect to compensate exposure by several stops when using this filter. It threads onto any lens with a 67mm filter diameter using standard screw-in mounting.