Astronomik H-Alpha 12nm CCD Filter - Canon EOS APS Clip

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  • Regular price $189.95
  • Astronomik H-Alpha 12nm CCD Filter - Canon EOS APS Clip

    • Sale
    • Regular price $189.95
    • ITEM #



    Astronomik H-Alpha 12nm CCD Filter - Canon EOS APS Clip

    Astronomik H-Alpha 12nm CCD Filter - Canon EOS APS Clip

    The Astronomik H-alpha filter is a narrow band filter for CCD photography. The filter lets the H-alpha light of emission nebulae pass and blocks nearly the whole remainder of the spectrum where the CCD is sensitive.

    The full width at half-maximum (FWHM) of 12nm is optimized for the use with common CCD cameras and allows the use of very fast optics. It should be noted that the filter has a transmission of up to 99%. Another advantage of the 12nm filters is the availability of guiding stars for cameras with a built-in-autoguider (SBIG). If you use a very strong filter like our 6nm filter you often wonƒ???????????t find a usable guidestar.

    The range of application extends from 1:2.8 to 1:15. Transmission losses and chromatic distortions, which arise with other filters, only occur with Astronomik filters when extremely bright aperture ratios of 1:2 and more come into play.

    The Astronomik H-alpha-CCD (12nm version) increases the contrast between objects, in this case between the H-alpha emission line and the skyglow background. Our Astronomik H-alpha-CCD (12nm version) completely suppresses the emission lines of artificial lighting (mercury (Hg) and sodium (Na)) and skyglow. When using the OIII CCD and the SII-CCD filters you can obtain three-color images of emission line objects (gas nebulae) from locations with very strong light pollution. To do so, you would take an image in three different wavelengths, select each one as a color-channel in Photoshop and paste them together as a color image. The Astronomik H-Alpha filter may NOT be used for solar observation. f you plan to create color images from emission line data, our CLS-CCD filter is a great choice for the Luminance channel.

    About the Astronomik Clip-Filter System....

    The patented Astronomik Clip-Filter System is black anodized aluminum and laser-cut on state-of-the-art modern machines. It can be inserted within seconds directly into the EOS camera body. There are no changes necessary and all lens functions (focus, screen, image stabilization) remain functional!

    Almost all Canon system lenses (with the exception of the EF-S series) and all M42 and T2 lens adapters, can be used with the Astronomik Clip-Filter System. The Clip-Filter System also acts as an outstanding dust shield, which prevents the possibility of dust settling on the sensor during long time exposure (The MC-Clear filter does not have a filter effect and only acts as a dust shield.)

    Note: For Photographers interested in daylight IR-Photography a "MC-modification" is possible for some cameras. If you are interested in this, please send us a short mail. We will give you more details. The "MC-modification" gives you no advantage for normal astrophotography! If you have a full-frame EOS camera, like the 5D or 6D, you should buy the Astronomik H-Alpha 12nm XL EOS Clip Filter instead.

    Astronomik H-Alpha 12nm CCD Filter - Canon EOS Clip Features

    • Transmission of over 97% with the H-alpha line (656nm)
    • Complete blocking from all disturbing wavelengths in the infrared
    • Parfocal with other Astronomik filters
    • Glass thickness: 1mm
    • 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

    Astronomik Product Number: HA12-EOS

    Additional Information

    Filter TypeH Alpha
    Free ShippingYes
    Warranty10 Year Warranty

    Questions & Answers

    Ask a Question
    • may I use this filter with canon 70D?

      Absolutely! You will find that it is best to use the longest exposure-times that your mount and temperatures (relative to noise-levels) will allow... but that's due to how faint the Hydrogen signal from most subjects is, combined with some of that l

    • may I use this filter with canon 70D?

      Hello! Could I use the Astronomik 12nm H-Alpha Filter on unmodded (normal) cameras, like stock Canon 7DMark II ? Would I see some image improvement? Thanks!

    • I have a Canon 450D, modified for astrophotography. Is there any problem with using this filter in addition to the UV/IR block filter installed? Would that be overkill? I live in a big city and want to cut the light pollution in my images.

      This filter should work great with your modified camera. The H-alpha line is deep-red, but should not see cut from the UV/IR cut filter used during an astro-mod. It's far from overkill... in a way they compliment each other. It may also be worth consid

    • May I use this filter with Canon 1100D?

      Yes, this filter will work with an 1100D or other Canon APS-C format DSLRs, although you cannot use EF-S lenses with the filter in place (EF lenses will work, though).

    • Can this Ha lens be used with unmodified Canon? can someone share pics of Sun taken using 6nm & 12nm that would really help me to get some idea on this variation?

      Yes to the first part of your question: this filter can be used with an unmodified Canon DSLR. However, the 6nm and 12nm filters are much too wide for solar imaging. These bandpasses are for shooting emission nebula in the night sky. You need a bandpas

    • Hi, how much of difference would I expect to see if let's say on the Orion nebula with this filter and without the filter? Thanks.

      The image will be very different with the Ha filter. It will be much dimmer (requiring longer exposures), and the only data getting through will be deep red (so you may want to convert to monochrome or just use the red channel when processing, but the co

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