Astronomik CLS CCD 50 x 50 mm, unmounted (SKU: 10208541 / 8h00ek) all astro filters opinie

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Astronomik CLS CCD 50 × 50 mm Filter, unmounted (Astronomik, SKU: 10208541 / 8h00ek) was designed for cameras intended for astronomical use. It enhances contrast between deep-sky objects and the sky background, making it ideal for astrophotography under light-polluted skies.

Compared to UHC filters, it offers a broader transmission range, allowing more light to pass through and resulting in less attenuation of stars.

The CLS CCD filter is optimized to block as much unwanted light as possible while transmitting the maximum amount of astronomical signal. It completely blocks emission lines from artificial light sources such as sodium (Na) and mercury (Hg) lamps as well as natural airglow.

The filter is suitable for mirrorless, DSLR, CMOS and CCD cameras and can be used with telescopes or lenses with focal ratios from f/1.8 to f/15.

Thanks to the integrated infrared (IR) blocking layer, it can also be used with cameras that do not have their own IR-cut filter.

Additional applications

• 1.25" and 2" mounted versions can also be used for observations from light-polluted locations
• excellent choice as a luminance filter for color imaging of emission-line objects

Alternatives

For cameras with a built-in IR filter or for visual observations, the Astronomik CLS filter is a more economical alternative.

Suitability

• CMOS and CCD photography: very good suppression of light pollution
• DSLR photography (original): good, shifted white balance but increased contrast
• DSLR photography (astro-modified): very good, nearly perfect color balance
• DSLR photography (MC-modified): very good, nearly perfect color balance

Technical specifications

• 95% transmission at 486 nm (H-beta)
• 95% transmission at 496 nm (OIII)
• 95% transmission at 501 nm (OIII)
• 97% transmission at 656 nm (H-alpha)
• transmission range: 450–520 nm and 640–690 nm
• glass thickness: 1 mm (except OWB Type 3 and XT filters)
• finely polished optical glass free of stress and inclusions
• extremely durable coating
• fully resistant to humidity and aging
• Astronomik MFR coating
• parfocal with other Astronomik filters
• diffraction-limited design
• optimized transmission ranges
• supplied in a durable, high-quality filter box

All Astronomik filters are parfocal and diffraction-limited, ensuring that the optical performance of your system remains uncompromised. Each filter undergoes strict quality control before shipment.