Day-for-night photography is an effect that makes a scene recorded in broad daylight appear as if it had been shot at dusk. This is typically achieved through the use of a filter that underexposes by approximately two stops, and can also produce a blue tint. Lighting, contrast and other factors contribute to the realism of this effect.

This filter is made of glass and measures 100 x 140 mm (4 x 5.65") x 4 mm thick.