Astroklar rectangular filter - night light filter 150 mm

Astroklar square filter - 150 mm night light filter

It is not without reason that scientific celestial telescopes are located on islands or in sparsely populated regions. The steadily increasing light radiation from cities and metropolitan areas, also as light smog or light pollution called, makes the observation and photography of stars or other celestial objects enormously difficult. However, the unpleasant veil is also annoying on "normal" night shots and city panoramas. DSLR and DSLM photographers are available Reducing the effects of light pollution now the new Rollei Astroklar night light filter to disposal. 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). Among other things, these wavelengths block our night light filters and thus enable shots of a starry sky and night shots without a yellow tinge - even in large cities and their environs.

Less light pollution, more detail and clarity

A special coating largely removes the yellow and orange light waves from the light , which are largely responsible for the disturbing veil of light. Above all, not only do recordings of the night sky and the stars gain significantly in contrast and clarity, the advantages of this high-quality special rectangular filter are also evident in nocturnal city photography, which can be used both in 150mm as well as in 100mm width is available immediately. In the case of architectural or long-term exposures in an urban environment, even filigree structures and contrasts in the subject are preserved and no longer “tear out”. Due to the extensive filtering of the warmer light components, your shots will generally appear a little cooler, so always carry out a manual white balance and select one Color temperature between +700 K and +1,500 K of the spectrum without using a filter to ensure the color authenticity of your images.

Best optical glass, double-sided nano-coating

So that you can also use your Rollei Astroklar filter for demanding projects and under adverse weather conditions, the high-quality optical glasses have been treated with a special nano-coating on both sides. This additional protective layer not only reliably prevents reflections from uncontrollable light sources, which are particularly annoying when taking pictures at night, but also has a strong water, oil and dirt-repellent effect. The cleaning of your Astroklar rectangular filter becomes child's play, if at all necessary. The light transmission when using the Astroklar filter is reduced by a 2/3 stop or f-stop. Generally we recommend, not only when combining with other filters likee gray filters,polarizing filters andGraduated Gray Filters in the filter holder, the use of atripod and/or oneremote trigger.

Technical specifications

scope of delivery