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Baader Narrowband H-Alpha (7nm) CCD Filter - 2" # FHALN-2 2458384

5.0 (6 Reviews) Read Reviews Write Review
Brand Baader Planetarium
Part Number 2458384
Availability available

Product Info

Manufacturer Description

CCD imagers will find Baader's Premium Narrowband CCD passfilters to deliver the absolute highest contrast deep sky images in H-Alpha, H-Beta, Oxygen III, and Sulfur-II, with the shortest exposures possible. Their ultra-narrow bandwidths have extremely high transmissions, while completely rejecting light pollution as well as the important blocking of longer wavelengths.

The high optical quality of the Baader narrowband filters guarantees no loss in sharpness or contrast. Each substrate is fine-optically polished plane parallel to deliver a smooth and accurate 1/4 wavefront over the entire surface. This special custom polishing operation sets Baader filters apart from the standard commercially precision polished filter substrates used by most other filter manufacturers.

In addition to their transmission properties, the Baader coatings were developed with another key goal in mind - eliminate the annoying reflections present in other narrowband astro-filters. To achieve this freedom from reflections, along with excellent out of band blocking, required careful design and testing of the coating stacks.

Coatings are professionally applied in Germany by the most sophisticated equipment available today, ensuring high consistency for bandpass centering, transmission, and out of band blocking. The anti-reflection coatings are designed to prevent halos and balanced to prevent physical deformation of the optically flat substrates. The ultra-hard ionbeam deposition ensures the coatings will never degrade from use or normal cleaning. Each filter is coated individually, permanently sealing the coating edges, in order to guarantee lifetime coating durability and uniformity. Baader mil-spec coatings won't degrade, peel or flake off, unlike the coatings of filters that have been simply cut out of pre-coated sheets of glass. This cutting operation leaves the coating edges rough and torn which enables penetration of moisture between the coatings and substrate.

Reviews

5.0 (Based on 6 Reviews) 83% of reviewers recommended this product.
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    1. Guest

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      Review by YOUNG H.
      1526560377
      May 17, 2018

      5.0 wonderful product!

      Pros:

      Cons:

      Comments:

      wonderful product!

      Bottom Line: Would you recommend this item? Yes
      Was this review helpful? Yes / No

      This review was provided courtesy of AgenaAstro.com

    2. Guest

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      Review by telescope tom of Tucson.
      1410048000
      Sep 6, 2014

      5.0 Really good for white light solar

      Pros:

      Accurate

      Cons:

      Comments:

      With Lunt solar wedge it dims the sun just right, didn't need to mess with variable polarizer.

      Bottom Line: Would you recommend this item? Yes
      Was this review helpful? Yes / No

      This review was provided courtesy of AgenaAstro.com

    3. Guest

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      Review by AstroDave of Connecticut.
      1391817600
      Feb 7, 2014

      5.0 As expected

      Pros:

      Strong Construction,No Reflection,Easy to Use,Quality Lenses

      Cons:

      Doesn't Come In 3 And 5nm

      Comments:

      Baadar makes a great product for the price. This one performs well without any reflections. I only wish they also made a 3 and 5nm versions.

      Bottom Line: Would you recommend this item? No
      Was this review helpful? Yes / No

      This review was provided courtesy of AgenaAstro.com

    4. Jesús Muñoz

      Jesús Muñoz New Member

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      User Notes:
      Review by Powerstar of Queretaro, Mexico.
      1357689600
      Jan 8, 2013

      5.0 Great H-alpha filter

      Pros:

      Excelent Value,High quality,Great optics

      Cons:

      Comments:

      What a great filter! The structure of the nebulas was easily captured with not so long exposures. The quality of the stars was also very good... and its price is atractive.

      Bottom Line: Would you recommend this item? Yes
      Was this review helpful? Yes / No

      This review was provided courtesy of AgenaAstro.com

    5. Guest

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      Review by Jeff B of Altair IV Observatory - Amelia, OH.
      1348531200
      Sep 24, 2012

      5.0 Baader Filters Are Excellent Quality.

      Pros:

      Well Made,Quality Materials

      Cons:

      Comments:

      There are many choices when it comes to astronomical accessories. Baader quality for the price has led me to build my 1.25" and 2" filter collection almost completely with their products. There are very few manufacturers of astronomical filters for the advanced amateur and pro who can compare to Baader.

      Bottom Line: Would you recommend this item? Yes
      Was this review helpful? Yes / No

      This review was provided courtesy of AgenaAstro.com

    6. Guest

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      Review by Mr Ray of Miami Florida.
      1319846400
      Oct 28, 2011

      5.0 Great Product

      Pros:

      Easy to Use,Quality Lenses

      Cons:

      Comments:

      Used this filter to capture HA on a few different Nebulae with great results. Had to image a little longer tnan I was anticipating but the results were great.

      Bottom Line: Would you recommend this item? Yes
      Was this review helpful? Yes / No

      This review was provided courtesy of AgenaAstro.com

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