Astronomik CLS Light Pollution Filter - CCD 2" Mounted

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  • Regular price $199.95
  • Astronomik CLS Light Pollution Filter - CCD 2" Mounted

    • Sale
    • Regular price $199.95
    • ITEM #

    • 8 available



    Astronomik CLS Light Pollution Filter - CCD 2" Mounted

    A CLS CCD Light Pollution Filter - 2-inch Mounted 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 - 2-inch Mounted 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-2


    Additional Information

    Filter TypeCLS
    Free ShippingYes
    Warranty10 Year Warranty

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    Questions & Answers

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    • I have a Starlight Xpress M26C One-shot color CCD camera, and want to know if the Astronomik CLS-CCD filter will give me good results when capturing the red in emission nebula.

      The CLSCCD filter will give you excellent response for red emission nebulae. The transmission is designed to maximize the Ha and SII lines in the red while minimizing the intrusion of artificial light pollution.

    • Hi can I use it on a WO Megrez 120mm APO?

      This focuser attaches using an SCT thread (2.00" - 24 TPI), so you would need an adapter with this thread on it in order to use this focuser. The Megrez 120 does not use a thread on the back - its focuser connects using a dovetail - so this will not fit t

    • Whats the best for astrophotograph with DSLR? Astronomik CLS or Lumicon Deep Sky

      The CLS filter you have noted is better color balanced for DSLR photography than any brand of broadband or Deep Sky filter - which are color balanced for the human eye rather than digital cameras. There will be a moderate cyan color shift with the CLS due

    • Hi: does this have a M48 male or female thread? or both?

      This filter has a male M48 thread on one side and a female M48 thread on the reverse side. It is compatible with 2" nosepieces and adapters that accept 2" mounted threads.

    • Hello. Is this compatible with my QHY8L camera?

      Yes, this filter will work with your QHY8L camera, but you will need to purchase an OS-A2T 2" to T thread adapter.

    • How much weight will The Meade #1209 Zero Image-Shift Microfocuser lift?

      Meade has no specific maximum limit noted for capacity, but we would feel comfortable recommending that you could mount a maximum of 3-4 lbs for this motorized focuser.

    • Do I need to purchase any adapter to attach this to my 2" t-adapter from televue?

      Hello Pawan, Thank you for your question. I think you're referring to the ACM-2000 filter which is Tele-Vue's 2" T-adapter. If that is the adapter that you have, then the filter will thread right onto the bottom of it without any additional adaptation.

    • will the autostar work with an LX 50

      Unfortunately, no. The LX50 was made before the Autostar 497 came out in 1999, and that scope is not compatible with the newer controllers.