• Explore Scientific CLS City Light Suppression Filter 1.25" — Reduce Light Pollution for Suburban Stargazing
  • Explore Scientific CLS City Light Suppression Filter 1.25" — view 2
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Explore Scientific

Explore Scientific CLS City Light Suppression Filter 1.25" — Reduce Light Pollution for Suburban Stargazing

Explore Scientific CLS City Light Suppression Filter 1.25" — Reduce Light Pollution for Suburban Stargazing

$85.00
$109.99 $85.00
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The Explore Scientific CLS City Light Suppression Filter is a 1.25-inch broadband telescope filter that fights light pollution so you can see more from suburban skies. It selectively blocks the wavelengths of common streetlights — mercury and sodium vapor — while passing the light of emission nebulae, darkening the sky background so faint deep-sky objects stand out with noticeably better contrast.

Who it's for

Visual observers under suburban or light-polluted skies who want more contrast on nebulae and star clusters without driving to a dark site. New to filters? See our guide to the best telescope filters for beginners.

Key features

  • Broadband light-pollution suppression — blocks mercury and sodium streetlight lines
  • Boosts contrast on emission nebulae and star clusters against a darker sky
  • Standard 1.25" threaded cell — screws into most 1.25" eyepieces
  • Multi-coated optical glass for clean, true views

Specifications

Type Broadband light-pollution (CLS) filter
Fitting 1.25" threaded
Best for Visual deep-sky under suburban skies
SKU 310225

Frequently asked questions

Will this make galaxies brighter?
A CLS filter works best on emission nebulae and improves contrast on many deep-sky objects, but it doesn't brighten broadband targets like galaxies and star clusters — it mainly darkens the light-polluted background so they stand out more.

Does it fit my telescope?
Yes, if you use standard 1.25" eyepieces — the filter threads into the bottom of the eyepiece barrel.

Is it for visual or photography?
This broadband filter is aimed at visual observing. For imaging, narrowband filters usually give better results under light pollution.

View full details

Frequently Asked Questions

With a beginner telescope you can see a surprising amount — the craters and mountains on the Moon, the rings of Saturn, the moons of Jupiter, and star clusters like the Pleiades. As you get more comfortable, you can also spot nebulae and distant galaxies. Not sure which beginner telescope is right for you? Check out our Telescope Buying Guide.
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All telescopes on Telescope Wolves are hand-picked with beginners in mind. If you're unsure which telescope is right for you, check out our Telescope Buying Guide.
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