Astronomik CLS CCD Light Pollution Filter - T-Thread Mount

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Astronomik CLS CCD Light Pollution Filter - T-Thread Mount

A CLS CCD Light Pollution Filter - T-Thread Mount by Astronomik:

The Astronomik CLS CCD is suitable under light-polluted skies for DSLR Cameras, which have been remodeled for astronomical use. The filter enhances the contrast between all deep-sky objects and the background.

The CLS-CCD Filter enhances the contrast between astronomical objects and the background. Due to the wider transmission curve compared to UHC filters, a greater amount of light will pass the filter. Stars will be less dimmed. This filter has been optimized to block as much spurious light as possible and simultaneously provide the best performance for useful light. A good filter for DSLR-, CCD- and film b/w-photography as well as observation of deep sky objects with telescopes or photo lenses of all aperture f/3 and above

The filter blocks completely emission lines of artificial light sources like streetlights (e.g. sodium- and mercury-vapor) as well as the airglow. All 'important' emission lines as well as the spectral range of the night-adapted eye are being passed. The supplementary IR-blocking layer allows the use for DSLR- and Webcams without an integrated IR-block filter.

Other uses for the Astronomik CLS CCD Light Pollution Filter include easier resolution of Double Stars and with the EOS-Clip model, photography with DSLR cameras is feasible even under extreme light-polluting conditions without shifting the white balance. The 1.25-inch and 2-inch socket models can be used for observations from light-polluted areas. If you plan to create color images from emission line data, our CLS-CCD filter is a great choice for the Luminance channel.


Astronomik CLS CCD Light Pollution Filter Features:

  • 92-percent transmission at 486 nm (H-beta)
  • 92-percent transmission at 496 nm (OIII)
  • 92-percent transmission at 501 nm (OIII)
  • 97-percent transmission at 656 nm (H-alpha)
  • Pass from 450 to 540 nm and from 640 to 690 nm
  • Parfocal with other Astronomik filters
  • Glass thickness: 1 mm
  • 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


OPT Product Number: AK-CLSCCD-T



Filter TypeCLS
Free ShippingYes
Warranty10 Year Warranty

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  • Hi I have beenn using your Nautilus Filter Wheel 7x1.25" with Windows 7 and ASCOM driver 6... for a long time without any problem. After my upgrade to Windows 10 I get the message " filter wheel can not been found". Should it work the same driver in Wi

    At the moment, Orion notes compatibility through Windows 8 on the Nautilus filter wheel. If you download the Win 8 driver here, you may be able to run the filter wheel in

  • Is this also good for unmodified - original - DSLR? I have Sony a6000 and someone said that a person having original DSLR should use CLS version rather than CCD version.

    The CCD version of the CLS filter will cut off the UV and IR wavelengths. This only necessary if your telescope system uses any refractive elements. Since your unmodified a6000 is unmodified, it will have UV/IR cutoff filtter on top the sensor. Getting th

  • This filter is compatible with the thread of a T-ADAPTER FOR SCHMIDT-CASSEGRAIN TELESCOPES?

    This will fit between the T adapter and the T ring for your camera using the M42x0.75 threads on each side, but it will not fit the larger 2" thread on the back of the SCT.