Tiffen W52IRND21 52mm Filter with Combination Neutral Density (ND) 2.1 Infrared (IR), Reduces ISO to 1/128

Tiffen WW IRND Filter Features

• High quality filter to prevent the color shift caused by the sensitivity of today's digital sensors
• Tiffen filters are manufactured using ColorCore technology, a closely guarded proprietary process that entails permanently laminating the filter material in between two pieces of optical glass that are ground flat to tolerances of a 10,000th of an inch, then mounting them in precision metal rings
• The ColorCore process allows Tiffen to control the color and density of their filters and the characteristics of special effects filters with much greater accuracy than typical dyed-in-the-mass filters, which usually exhibit color and density variations
• Natural Density Filters enables slow shutter speeds to be used, especially with high speed films, to record movement in subjects such as waterfalls, clouds, or cars
• Natural Density Filters decreases depth of field by allowing wider apertures to be used, which helps separate subjects from their background
• Natural Density Filters decreases the effective ISO of high speed film (above ISO 400) and allow it to be used outdoors in bright situation
• Natural Density Filters allows cine and video cameras (which have fixed shutter speeds) to film subjects such as snow, sand or other bright scenes which could cause overexposure
• Minimizes IR Contamination of Images