The Formatt 4 x 4" Graduated Reverse Neutral Density (ND) 0.9Filter is a unique filter that allows you to shoot sunrises and sunsets while still retaining detail in the foreground. Traditional graduated neutral density filters filter from the top of the filter downwards and allow you to balance a bright, contrasty sky with a dark foreground. However, this innovative filter works in just the opposite way. The transition starts in the middle and works its way to the top thereby allowing you to control the light where it is brightest (horizon) while holding detail in the foreground.
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.
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 situation
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
Graduated Reverse Neutral Density
4 x 4" (100 x 100mm, 4mm thick)
3-stops, (exposure adjustment = 3 stops, reduces ISO by 1/8)
Permits you to hold detail in the foreground when shooting sunrises and sunsets
Nature, Travel, Outdoor photography
Front Filter Thread Size
Front Lens Cap Size
Formatt Hitech 4 x 4" Graduated Reverse Neutral Density (ND) 0.9 Filter