Astronomik CLS CCD 1,25 (M28,5) (SKU: 10208125 / 8h00dp) all astro filters opinie

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Astronomik CLS CCD 1.25" (M28.5) Filter (Astronomik, SKU: 10208125 / 8h00dp) was developed for cameras intended for astronomical use. It enhances contrast between all deep-sky objects and the sky background, making it ideal for astrophotography under light-polluted skies.

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

The 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 (sodium Na and mercury Hg lamps) as well as natural airglow.

It 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 is also suitable for cameras without a built-in IR blocking filter.

Additional applications

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

Alternatives

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

Suitability

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

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