Astroklar rectangular filter - night light filter 100 mm

Astroklar rectangular filter

It is not without reason that scientific celestial telescopes are located on islands or in sparsely populated regions. The constantly increasing light radiation from cities and metropolitan areas, also as Light smog or light pollution called, makes observing and photographing stars or other celestial objects extremely difficult. The unpleasant veil also disturbs “normal” night photos and city panoramas. DSLR and DSLM photographers are available Reducing the effects of light pollution the Rollei Astroklar night light filter available. The artificial light sources that cause the greatest light pollution are sodium vapor lamps (light wavelength approx. 590 nm) and mercury vapor lamps (light wavelength 545 nm and 580 nm). Our night light filters block these wavelengths, among other things, allowing you to take pictures of starry skies and night photos without a yellow cast - even in large cities and their surrounding areas.

Less light smog, more detail and clarity

A special coating removes most of the yellow and orange light waves from the light, which are largely responsible for the disturbing haze of light. Above all, not only do shots of the night sky and stars gain significantly in contrast and clarity, the advantages of this high-quality special rectangular filter are also evident in nighttime city photography in 100 x 100 mm width is available. When taking architectural or long-term exposures in urban environments, even delicate structures and contrasts in the subject are retained and no longer "break out". Due to the extensive filtering of the warmer light components, your photos will generally be a little cooler, so always carry out a manual white balance and choose one Color temperature between +700 K and +1,500 K of the spectrum without the use of filters to ensure the color authenticity of your images.

Best optical glass, double-sided nano coating

So that you can use your Rollei Astroklar filter even in demanding projects and under adverse weather conditions, the high-quality optical glasses have been coated on both sides with a special nano-coating. This additional protective layer not only reliably prevents reflections caused by uncontrollable light sources, which are particularly annoying when taking night photos, but also has a strong water, oil and dirt repellent effect. Cleaning your Astroklar rectangular filter becomes child's play, if necessary. The light transmission when using the Astroklar filter is reduced by 2/3 stop or f-stop. In general, we recommend not only when combining with other filters such as e Gray filters, Polarizing filters and Gray gradient filters in the filter holder, the use of one tripod and/or one remote shutter release.

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