Manufacturer: Astronomik Filter
Product number: 8h00ed

EUR 189,00


incl. 19 % VAT (DE)  
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Astronomik CLS-CCD Nebula Filter for Astrophotography
This filter is suitable for photographing nebulae, star clusters and also galaxies even from close to the city. The contrast of the deep-sky objects is enhanced, because the light of the artificial illumination is blocked as far as possible. This allows you to expose 3x longer before the sky background is brightened. The CLS CCD filter thus improves results whether you are working near cities or under dark skies far from settlements.

The CLS CCD filter is ideally suited for photographic use on telescopes of all apertures with focal ratios from f/15 to f/2.

The principle of operation of the CLS CCD filter:
The filter completely blocks the emission lines of low and high pressure lamps (mercury (Hg) and sodium (Na)) and the lines of airglow. This improves contrast everywhere, even under dark alpine skies.

All important emission lines of astronomical objects are transmitted. The filter also blocks infrared light (IR light). An additional IR blocking filter is therefore not necessary.

For which cameras is the CLS CCD filter suitable:
The filter is suitable for virtually all cameras. It is optimal for color cameras, because it improves the contrast without distorting the color. We therefore recommend the filter especially for DSLR and system cameras and for astro cameras with color CMOS sensors. But the filter is also well suited for monochrome cameras, for example to make good luminance images.

The filter also provides contrast enhancement during visual observation.

When mounting, the orientation of the filter is unimportant, as both sides have an anti-reflective coating.

The protective ring provides optimum protection for the filter:
Astronomik delivers the round filters from 31 mm diameter with a protective ring at the edge. The ring protects the filter from scratches on the edge and stabilizes the filter. The ring is 3.5 mm high.
Connection:T thread (M42x0.75)
Thickness of the filter glass:1 mm
Material of the filter cell:Aluminum
Transmission at 486 nm (H-beta):95%
Transmission at 496 nm ([O III]):95%
transmission at 501 nm ([O III]):95%
Transmission at 656 nm (H-alpha):97%
1st transmission range:450 nm to 520 nm
2nd transmission range:640 nm to 690 nm
Substrate:Fine optical polished substrate material
Parfocal:with all other Astronomik filters
Anti-reflective coating:Not sensitive to moisture, not aging, scratch resistant
Filter in robust plastic box



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