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The 100mm (4") Master Neutral Density Filter Kit 4 from Hitech contains six filters; three Solid Neutral Density Filters (0.3, 0.6, 0.9) and three Graduated Neutral Density Filters (0.3, 0.6, 0.9). With this kit, the outdoor photographer can create some wonderful images and is also prepared to shoot under a wide variety of lighting conditions. Inasmuch as the Master Kit is complete with both solid and grads, there will be no need to buy additional ND filters. The basic advantage is that it enables the shooter to adjust exposure without affecting color balance. An ND filter appears gray and reduces the amount of light reaching either the sensor of a digital camera or the film plane of a traditional film camera.
A Solid Neutral Density filter is used to create some unusual special effects such as capturing the "blur" of the rippling water of a waterfall or the swirling effect of city traffic. Since it allows the use of slower shutter speeds in bright light, it becomes possible to create these special effects that would normally not be possible to capture without the filter. And, since it can also help to control your depth of field, it permits you to shoot at wider apertures. Ultimately, its value is in helping to prevent bright, overly washed out images shot in bright light. Soft/Hard designation indicates the degree of transition of the filter.
A Graduated Neutral Density filter is used 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, over-exposed sky while exposing for the sky will leave the foreground dark and under-exposed. Hitech Grad ND filters are part clear, part neutral density. They allow the transition to be blended into the scene, often imperceptibly.
Soft edge grads have a smooth transition from clear to ND. Hard edge grads have a more defined hard lined transition and should be used for longer lenses.
Neutral Density Filters Have Four Main Uses
To enable slow shutter speeds to be used, especially with high speed ISOs, 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
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 discernible 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
Hitech filters are manufactured to exacting standards and can be counted on to be consistent filter to filter which means you can change filters mid shot or from day-to-day and still maintain the same exposure
Hitech filters are made by Formatt, a company with three generations of professional filter-making experience produces every filter to the highest technical standards. The finest materials, together with state of-the-art production technology have resulted in a standard of optical excellence unmatched anywhere else
In the Box
Formatt Hitech Neutral Density Master Kit 4 (6 Filters)
0.3 Solid Neutral Density Filter
0.6 Solid Neutral Density Filter
0.9 Solid Neutral Density Filter
0.3 Graduated Neutral Density Filter
0.6 Graduated Neutral Density Filter
0.9 Graduated Neutral Density Filter
Warranty Against Manufacturer's Defects
Table of Contents
Neutral Density Master Kit 4
Solid Neutral Density Filters: 100 x 100mm (4 x 4")
Graduated Neutral Density Filters: 100 x 125mm (4 x 5")
0.3 = 1 stop 0.6 = 2 stops 0.9 = 3 stops
0.3 = Reduces ISO by 1/2 0.6 = Reduces ISO by 14 0.9 = Reduces ISO by 1/8
Solid NDs: To use high speed ISOs in bright light Create special effects such as "blurs" when photographing water
Graduated NDs: Balance light intensity between sky and foreground Prevent washed out skies while capturing detail in a dark foreground