Formatt Hitech 85mm 1.5mm Resin Black & White Kit with 4 Filters: 8 Yellow, 11 Yellow-Green, 21 Orange and 25 Red

The Formatt Hitech Black & White Filters are used to reduce or eliminate atmospheric haze, make the tonal reproduction in monochrome imagery more natural and give deliberate emphasis to certain tones and objects. Filters for use with black and white film have strong colors that block wavelengths sufficiently enough to produce shifts in gray tones.

The Black & White Filter Kit is made up of the 8 Yellow, 11 Yellow-Green, 21 Orange and 25 Red filters. The 8 Yellow greatly increases contrast and is particularly useful for midday sun and deep shadow. It accentuates clouds, reduces haze and will reproduce distance better. The 11 Yellow-Green retains tonal value but reduces haze and brightens green. The Orange 21 contrast filter is for over-correction of skies. This filter absorbs a small amount of green and will make clouds brighter against the sky. The 25 Red contrast filter accentuates red picture parts set off against green or blue.