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Celestron Light Pollution Imaging Filter for 11" RASA

SKU: CLS-93617

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  • Take beautiful astrophotography images without the impact of light-polluted suburban locations using the CGX Equatorial 1100 RASA (Rowe-Ackermann Schmidt Astrograph) Telescope

  • Custom designed to replace the RASA's optical window, for optimum optical performance while using the additional filter 

  • Blocks unwanted light pollution while providing over 90% transmission at critical wavelengths 

  • Maintains a more neutral colour balance than other light pollution imaging filters, perfect for imaging colourful nebulae and galaxies

  • Clear plastic case to protect the filter when not in use

  • Every filter is individually tested for light transmission. A graph of test results for your specific filter is included for your reference

Dispatch in 5-7 Days

Regular Price: $1,540.00

Special Price $1,419.00

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Get the most out of your 11" RASA (even under light-polluted skies) with this Light Pollution Imaging Filter! No matter which camera you use, this filter’s generous 68mm clear aperture allows it to easily accommodate today’s largest sensors. Utilizing a machined aluminum housing and Schott B270 glass, the filter replaces the RASA’s clear optical window so the RASA’s optical performance is unaltered. 

Remove light pollution while keeping your images bright: 
Light pollution limits how much of the night sky we can see and photograph. When imaging with a color camera in light polluted areas, skyglow degrades image quality. Light pollution filters help to selectively block light emitted from common streetlights and other ambient lighting. But most light pollution filters greatly compromise the total light throughput, causing dim images, and negatively impact the color balance, causing images to appear too green or blue.

The Light Pollution Imaging Filter for RASA “surgically” removes unwanted light pollution while preserving as much of the useful spectrum as possible. That means you’ll still retain over 90% of the light captured by your telescope at many wavelengths.

Unlike other light pollution suppression filters, the Celestron LP Imaging Filter for RASA maintains a relatively neutral color balance so you can bring out subtle color in galaxies and other faint deep sky objects. Multiple layers of specially-formulated dielectric coatings provide the desired transmission, while anti-reflective coatings minimize star halos and internal reflections.

Each filter comes with a plastic storage case to safely store the filter or the placeholder glass that came with your RASA when not in use. You will also receive a spectral transmission graph unique to your specific unit, verifying its performance.


Material Schott B270
Glass thickness 2.1mm
Filter diameter 72mm
Clear aperture 68mm
  • Hard coated dielectric
  • Multi-layer anti-reflection
Housing Anodised aluminium

About Celestron
Celestron was founded by Tom Johnson whose first telescope design was a simple 6-inch reflector, built for his young son. He gradually progressed to making larger scopes in more sophisticated designs. Today, the Celestron company is an industry leader in designing and manufacturing optical equipment including telescopes (computerised and non-computerised), binoculars, spotting scopes and its accompanying accessories. Celestron's legacy spans 50 years, and has grown to enjoy recognition from amateurs to serious astronomers globally. The company seeks to remain innovative by growing its product offerings, while supporting science education around the world.


Additional Information

Additional Information

Optical Design No
Compatibility No
Focal Length No
Exit Pupil No
Eye Relief No
Field of View (Apparent) No
Number of Elements No
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Shipping Weight No
Warranty Information Not provided by Celestron
Additional Specifications of Product No
Loupe Colour No