Formatt Hitech 4.5" Round Combination Light Balancing 81EF/ND 0.6 Glass Filter (2-Stop)

BH #FO81EFN.64.5 • MFR #BF 4.5-81EFND.6
Formatt Hitech
Formatt Hitech 4.5" Round Combination Light Balancing 81EF/ND 0.6 Glass Filter (2-Stop)
Key Features
  • 0.6 Solid Neutral Density Filter
  • SCHOTT-Desag B270 Crown Optical Glass
The Formatt 4.5" Round Combination Light Balancing 81EF/ND 0.6 Filter, made with SCHOTT-Desag B270 crown optical glasscombines the effects of an 81EF light balancing filter with a neutral density filter.
Discontinued

Formatt Hitech 4.5" Round Combination Light Balancing 81EF/ND 0.6 Glass Filter (2-Stop)

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Formatt Hitech BF 4.5-81EFND.6 Overview

The Formatt 4.5" Round Combination Light Balancing 81EF/ND 0.6 Filter, made with SCHOTT-Desag B270 crown optical glasscombines the effects of an 81EF light balancing filter with a neutral density filter.

An 81EF filter (the strongest in the 81 series) will more than replace the yellow missing from the image and place all skin tones on a distinctly warm level.

Neutral density filters appear gray and reduce the amount of light reaching the film. They have no effect on color balance and are very useful when you want to shoot high speed film outdoors on a very bright day.

Often it is necessary or desirable to balance the light intensity in one part of a scene with another. This is especially true in situations where you don't have total light control, as in bright contrasty landscapes. Exposing for the foreground will produce a washed-out, overexposed sky while exposing for the sky will leave the foreground dark and underexposed. This filter enables cloud detail to be kept correctly exposed in the picture.

Determining which graduated neutral density filter yields ideal results for any given lighting situation takes knowledge, experience, and a collection of such filters. Choose the filter strength that adjusts the lighting to stay within the exposure latitude (greatest difference between bright/dark values) and still shows details in either the digital or film medium in use.

Speaking generally, the 2-stop value (ND 0.6—the filter's clear portion allows 4x more light to pass versus the darkest portion) effectively compensates average bright sky-to-foreground situations, and the soft transition is applicable more often to a scene than the hard transition.

 

Neutral Density Filters Have Four Main Uses

To enable slow shutter speeds to be used, especially with high-speed films, to record movement in subjects such as waterfalls, clouds, or cars
To decrease depth of field by allowing wider apertures to be used, which helps separate subjects from their background
To decrease the effective ISO of high speed film (above ISO 400) and allow it to be used outdoors in bright situations
To allow cine and video cameras (which have fixed shutter speeds) to film subjects such as snow, sand or other bright scenes which could cause overexposure

Neutral Density Factors

ND.3 (exposure adjustment = 1 stop, reduces ISO 1/2)
ND.6 (exposure adjustment = 2 stops, reduces ISO 1/4)
ND.9 (exposure adjustment = 3 stops, reduces ISO 1/8)
ND 1.2 (exposure adjustment = 4-stops, reduces ISO 1/16)

Formatt Hitech BF 4.5-81EFND.6 Specs

Filter TypeSolid ND Combination
Combination Type81EF Color Conversion
Density0.6 (2-Stop)
Circular Size4.5"
RotatingNo
Front Accessory Thread / BayonetUnthreaded
Filter Thickness0.16" / 4 mm
Filter MaterialGlass
CoatingsNone
Packaging Info
Package Weight0.3 lb
Box Dimensions (LxWxH)2 x 2 x 2"
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