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Celestron Narrowband H-Alpha/H-Beta/OIII Imaging Filter for 8-Inch RASA

  • mfr: 93619
  • SKU: 93619-CELESTRON
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Product highlights

  • Enhance imaging of nebulae with your 8-inch (RASA)
  • Blocks light pollution and improves image contrast
  • Filter transmits only the key Ha-Hb-OIII wavelengths
  • Blocks light wavelengths from sources of light polluted skies
  • Engineered specifically to work with RASA’s fast F/2 optics
  • Fits into the 8-inch RASA’s integrated filter mount
  • Constructed of Schott glass with anti-reflection coatings

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Celestron Narrowband H-Alpha/H-Beta/OIII Imaging Filter for 8-Inch RASA

Bring out the best in your nebulae astroimages with the H-alpha H-beta OIII (Ha-Hb-OIII) Imaging Filter for the 8-inch RASA. This specialized filter allows high transmission of light from emission nebulae while blocking light pollution, helping to make your images pop with detail off the black sky background with superior contrast. Fortunately, many sources of light pollution have relatively discreet emission spectra; they emit primarily at specific wavelengths of light. By strategically blocking these 'bad' wavelengths, the filter essentially eliminates the effect of light pollution while letting the 'good' wavelengths of light associated with the emission nebula pass through to the camera. You’ll notice much higher contrast in your images immediately, even if imaging from your light-polluted backyard! And since the transmission at the key wavelengths is so high, the nebula will not be dimmed—only the background will be blacker.

Nebula Hunting

The H-Alpha/H-Beta/OIII Imaging Filter for the 8-inch RASA is perfect for imaging emission nebulae like the North America Nebula (NGC 7000), Lagoon Nebula (M8), Orion Nebula (M42), and the Carina Nebula (NGC 3372). The imaging filter transmits key H-Alpha/H-Beta/OIII wavelengths that produce high contrast for emission nebulae. The transmission spectrum for the Imaging Filter is 85% or greater at key wavelengths (486nm, 496nm/501nm, 656nm) and less than 0.5% transmission elsewhere. The Imaging Filter for the 8-inch RASA is a narrowband filter that blocks much of the visible spectrum and only lets specific wavelengths through. Because of this, it will not work well on broadband emission objects, such as galaxies and star clusters. The Celestron Imaging Filter for the RASA 8 was custom engineered to work at F/2, so none of the “good” light from the nebula is inadvertently blocked by the filter.

Body and Storage

The filter is machined aluminum black anodized cell with knurled rim for easy grip during installation. An anti-reflection coating has been added to the filter to help suppress reflections on the glass. The filter fits directly into the internal filter mount in the RASA 8’s front lens cell, where the optical window normally mounts. By removing the clear window and replacing it with the filter, optical performance for the entire system is maintained. No other adapter is needed.

Specifications

Main
Configuration Core
Color Black

Questions

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Returns

Returns are incredibly simple. Please log into your account, find your item you wish to return and follow the prompts to make a return. If you do not have an account, click here to find your order and make a return.
You will receive a full refund when you return an item in its original manufacturer’s packaging, undamaged and unmarked. If the item you are returning is priced at less than $35, you will be charged a 15% restocking fee. Please note you will not be refunded any shipping charges. 
You have 30 days to make a return. During the holiday season, from November 1 to December 31, we extend the return window to 60 days. 
If your order has been noticeably damaged in transit, we strongly recommend that you refuse delivery and notify us immediately. Claims for missing items or items damaged in transit must be made within 48 hours of delivery. If there is carrier damage, please contact [email protected] with your order number and a description of the damage. 
Oh no! Please contact our customer service team so we can resolve the issue immediately. You can call us on 1.800.221.0828, email us at [email protected], or send us a message here.  
We do not currently offer exchanges. Please return the item you purchased within 30 days and order what you’d like instead. 
If you ordered a kit, you must return all components and accessories to receive a full refund. 
If you ordered a product that included a free item, you must include the free item with your return. If not, your return will not be accepted and you will not receive a full refund. 
We currently only offer camera repairs at our Brooklyn store. The item must be dropped off and collected in person as we do not accept shipped items for repair. For more information, please call our Brooklyn store on 1.718.431.7900. 
Most items can be returned within 30 days for a full refund. Click here to read our full return policy. 

Shipping and Returns

Same Day Shipping

All orders placed by 4PM( EST), Monday through Thursday, and by 11AM (EST) on Friday, are shipped same day. Orders placed outside these times will ship the next business day. We do not ship internationally or to Puerto Rico, Guam and other US territories at this time. For more details click here.

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Flexible, Easy Returns

If you're not happy with your purchase for any reason, our flexible 30-day free return policy makes it easy to get a full refund. Click here to view our return policy.

Ratings and reviews

Celestron Narrowband H-Alpha/H-Beta/OIII Imaging Filter for 8-Inch RASA

Celestron Narrowband H-Alpha/H-Beta/OIII Imaging Filter for 8-Inch RASA SKU: 93619-CELESTRON

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