Lens Kit
The Lens Kit is a little TLC for your ContourHD1080p Camcorder. It includes extra lens covers and even a replacement Lens Ring for when you put it through the ringer. And even better, with the Lens Adaptor Ring, you can now screw on a standard 37mm lens filter to get the perfect shot in the toughest lighting conditions.
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 Unless you are filming in a low light environment, a transparent filter is highly recommended to protect the lens as it is easier and cheaper to change a scratched filter than a scratched lens. For aerial filming a ND filter is indispensable to reduce over-exposed areas on the frame, get a better blue colour for the sky and more contrast with clouds.
Aviator's indispensable
Neutral Density Filters
When it is desirable to maintain a particular lens opening for sharpness or depth-of-field purposes, or simply to obtain proper exposure when confronted with too much light intensity, use a neutral density (ND) filter. This will absorb light evenly throughout the visible spectrum, effectively altering exposure without requiring a change in lens opening and without introducing a color shift.
Neutral density filters are denoted by (Optical) Density value. Density is defined as the log, to base 10, of the Opacitance. Opacitance (degree of absorption) of a filter is the reciprocal of (and inversely proportional to) its Transmittance. As an example, a filter with a compensation of one stop has a Transmittance of 50%, or 0.5 times the original light intensity. The reciprocal of the Transmittance, 0.5, is 2. The log, base 10, of 2 is approximately 0.3, which is the nominal density value. The benefit of using density values is that they can be added when combined. Thus two ND .3 filters have a density value of 0.6.
However, their combined transmittance would be found by multiplying 0.5 x 0.5 = 0.25, or 25% of the original light intensity.
Neutral density filters are also available in combination with other filters. Since it is preferable to minimize the number of filters used (see section on multiple filters), common combinations such as a Wratten 85 (daylight conversion filter for tungsten film) with a ND filter are available as one filter, as in the 85N6. In this case, the two stop ND .6 value is in addition to the exposure compensation needed for the base 85 filter.
Ultraviolet Filters
Film, as well as video, often exhibits a greater sensitivity to what is to us invisible, ultraviolet light. This is most often outdoors, especially at high altitudes, where the UV-absorbing atmosphere is thinner; and over long distances, such as marine scenes. It can show up as a bluish color cast with color film, or it can cause a low-contrast haze that diminishes details, especially when viewing far-away objects, in either color or black-and-white. Ultraviolet filters absorb UV light generally without affecting light in the visible region.
It is important to distinguish between UV-generated haze and that of air-borne particles, such as smog. The latter is made up of opaque matter that absorbs visible light as well as UV, and will not be appreciably removed by a UV filter.
Ultraviolet filters come in a variety of absorption levels, usually measured by their percent transmission at 400 nanometers (nm), the visible-UV wavelength boundary. Use a filter that transmits zero percent at 400 nm, such as the Tiffen Haze 2, for aerial and far-distant scenes; the Tiffen Haze 1, transmitting 29% at 400 nm, is fine for average situations.
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Euro € 29.00
excl GST
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