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home > Astronomik CLS Filters available in a variety of sizes. > Astronomik CLS Filters available in a variety of sizes.

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Astronomik CLS Filters available in a variety of sizes.The Astronomik CLS is a budget filter for visual observation, Black & White photography and CCD photographs of nebulae, galaxies and star clusters with astronomical instruments of any size. The Astronomik CLS blocks the light of the spectral lines of mercury and sodium vapor lamps and lets the largest part of the visible light and H alpha emissions pass. All the important emission lines, as well as the spectral region that the very well dark adapted

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product description

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The Astronomik CLS is a budget filter for visual observation, Black & White photography and CCD photographs of nebulae, galaxies and star clusters with astronomical instruments of any size.

Name: Astronomik CLS Filters available in a variety of sizes.
Brand: www.randa.lt
SKU: 24710079880
Price: 97.00 USD
Availability: InStock
Rating: 4.3033 (151 reviews)

The Astronomik CLS blocks the light of the spectral lines of mercury and sodium-vapor lamps and lets the largest part of the visible light and H-alpha emissions pass. All the important emission lines, as well as the spectral region that the very well dark adapted eye can see, can pass through the filter.

Main use

How to read the chart

Suitability

Visual observation (dark skies): Good, to reduce light pollution by mercury-vapour lamps (streetlight)
Visual observation (urban skies): Good, an UHC-E or UHC filter is more suitable
Film photography: Very good, colour balance is near perfect
CCD photography: Good, when used with an additional IR-block-filter
DSLR photography (original): Good, colour balance shifted but contrast enhanced
DSLR photography (astro modified): Very good, colour balance is near perfect
DSLR photography (MC modified): Good, when used with an additional IR-block-filter
Webcam / Video (Planets): Unsuitable
Webcam / Video (Deep Sky): Very good, if light pollution is a big problem

Technical Data

92% transmission at 486nm (H-beta)
92% transmission at 496nm (OIII)
92% transmission at 501nm (OIII)
97% transmission at 656nm (H alpha)
Pass from 450 to 540nm and beyond 650nm
Parfocal with other Astronomik filters
Glass thickness: 1mm
Completely resistant against high humidity, scratches and aging effects
Diffraction limited, the filter will not reduce the optical performance of your telescope!
Astronomik filters are delivered in a high-quality, long-lasting filter box
Since 2008, we ship filters with a completely new design. Any kind of halo or strange reflection is a matter of the past