The Tiffen Series 9 solid infrared (IR) neutral density 2.1 filter has several uses and offers the possibility of achieving results that would otherwise be impossible. This filter provides a clearer and purer neutral density than that provided by standard ND filters. The advantage is that it works better with today's high definition cameras and lenses. Thanks to this improved clarity, higher grade ND filters can be used whilst allowing the photographer to adjust exposure without affecting colour balance. ND filters appear grey and reduce the amount of light reaching either a digital camera's sensor or the film plane of a traditional camera. Neutral density filters are used to create unusual special effects such as capturing the "blur" of rippling water from a waterfall or the swirling effect of city traffic. As they allow the use of slower shutter speeds in bright light, it becomes possible to create these special effects which would not normally be possible to capture without the filter. And as they can also help control your depth of field, they allow you to photograph with wider apertures. Ultimately, their value lies in helping to prevent bright and overly washed-out images taken in bright light. A 2.1 neutral density filter (7 stops) creates such a distinction between foreground and background that your subject will be completely isolated from the rest of the image. Water will appear to flow at a rapid pace even if, in reality, it was just a trickle. Using this filter on a very bright beach with high ISOs will prevent the shot from being completely washed out and overexposed. Water White glass, incorporating ColorCore technology, is characterised by high transmission quality. Typically, it will transmit 98 to 99% of light. It also has anti-reflective and anti-glare qualities that make it useful in a wide range of applications, including the film industry, shop windows and art exhibitions. The glass is virtually flawless and is becoming increasingly widespread in digital equipment. Reduces infrared leakage above 700nm This is particularly important as it now allows the use of heavier grades of neutral density filters required for high definition cameras whilst maintaining full colour balance Neutral density filters have four main uses - Allow the use of slow shutter speeds, particularly with high ISOs, to record movement of subjects such as waterfalls, clouds or cars - Decrease depth of field by allowing the use of wider apertures, which helps separate subjects from their background - Decrease the effective ISO of high-speed films (above 400 ISO) and allow their use outdoors in bright situations - Allow film and video cameras (which have fixed shutter speeds) to film subjects such as snow, sand or other bright scenes which could cause overexposure Superior quality - Major Hollywood film studios rely on Tiffen filters for their multi-million pound productions. Superior quality and design make Tiffen the overwhelming choice of filmmakers, professional photographers and even NASA - Tiffen has also received an Emmy from the Academy of Television Arts and Sciences for its excellence in engineering Features