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Celestron Light Pollution Imaging Filter for RASA 8' - Enhancing, Minimalist, Schott B270 Glass

4.6 (2) Write Review
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$274.99

$ 99 .00 $99.00

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About this item

  • ENHANCED IMAGING - Specifically designed for Rowe-Ackermann Schmidt Astrograph 8" telescopes, this filter excels at reducing light pollution for clearer, more detailed astrophotography.
  • SUPERIOR CONTRAST - Dichroic, multi-layer anti-reflection coatings maximize light transmission, enhancing contrast of deep-sky objects against the background sky for stunning visuals.
  • PREMIUM GLASS - Crafted with high-quality Schott B270 glass, ensuring exceptional optical quality and minimal distortion, delivering true-to-life celestial views every time.
  • DURABLE DESIGN - The filter housing is made from anodized aluminum, providing robust protection against scratches and impacts, ensuring long-lasting performance in the field.
  • OPTIMIZED FIT - With a clear aperture of 43mm and a field diameter of 46mm, this filter is precisely engineered to fit the RASA 8" telescope, guaranteeing seamless integration.



5.0 out of 5 stars Best Sellers Rank
  • #107 in Telescope Filters
 Date First Available October 25, 2018 Manufacturer Celestron Country of Origin China

Light pollution in the night sky can significantly degrade contrast in astronomical images. This is especially true when using very fast telescopes like the 8" RASA because the sky background saturates very quickly. The "noise" of the light pollution overwhelms the "signal" from the celestial object you are imaging, making it difficult to get the most detailed image. The Light Pollution Imaging Filter for the 8" RASA remedies this by blocking light pollution while transmitting light from deep-sky objects. The result is bright, detailed objects that pop 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 wavelengths, the filter greatly reduces the effects of light pollution without degrading overall image quality. The Light Pollution Imaging (LPI) Filter for the 8" RASA blocks light from some of the most common sources of light pollution between 400-700nm (i.e., the visible spectrum), including high- and low-pressure sodium-vapor streetlights, mercury-vapor streetlights, and natural airglow caused by oxygen in the atmosphere. Unlike some light pollution filters, the LPI filter blocks only specific areas of the spectrum instead of wide regions. This helps to maintain image brightness and color balance. In addition, specific wavelengths associated with emission nebulae,


Night Sky Fan
Reviewed in the United States on July 13, 2022
I use two filters with my RASA 8 and a ZWO ASI2600Pro color camera, this one and an IDAS NBZ, from my Bortle 5-6 suburban site. With a color cam on or the other is always on the scope. The dual narrow band NBZ is dramatically effective on Ha/O nebulae, This broadband filter is less dramatic in effect but still very useful. If I was comparing it with the 5 star NBZ it might be 4.5 stars for this one.The comparable filter would be one of the IDAS broadband filters.This is not an endorsement for the other Celestron RASA filter, the tri-band Ha/Hb/O. That filter has unacceptable halos and reflections..
Ralph Waid
Reviewed in the United States on June 9, 2022
Installed and helped in my bortel 5 skys. Would purchase again.