Formatt 4x5.65" Clear Glass Filter

• Each filter is manufactured from Schott Water White Clear Optical Glass

• Absolute consistency in color and density to Kodak Wratten standards

• Precision grinding and polishing result in unbeatable optical flatness allowing use on even ultra-long focal length lenses

• Filter edges are protected with a unique frame for maximum protection and easy handling

Absorbing Cell Technology

• The secret to Formatt's consistency in filter design lies in its unique "Absorbing Cell Technology" (A.C.T.); This unique process allows color correct dyes to be applied to optically pure, wafer thin absorbing cells and offers a controllability that ensures the smoothest grad lines and consistent color across the whole filter surface.

• This process is revolutionary compared with conventional filter dying techniques by eliminating the need to directly coat the glass surface itself; The repeatable performance gained through A.C.T. ensures that at any time you have to swap like filters for like filters mid shoot you can do so with confidence with no discernable differences in color or density.

• Each filter is guaranteed flatness to a maximum 2-wave value and comes with an individual reading from a laser interferometer; Every filter is carefully verified with a densitometer and spectrophotometer to ensure consistent and accurate transmission, before leaving the factory - the result is an absolute purity of image that eliminates any unwanted colorcast caused by conventional greenish soda-lime glass.

Type

Clear

Size

4x5.65" (100 x 140 x 4 mm thick)

Grade

Not Applicable

Filter Factor

0

Multi-Coated

Yes

Rotating

Not Applicable

Effect

None

Application

Protection

Color Temperature

Not Applicable

Construction

Schott Water White Clear Optical Glass

Front Filter Thread Size

Not Applicable

Front Lens Cap Size

Not Applicable