• Explore Scientific H-Beta Narrowband Filter 2" — Boost Contrast on Hydrogen-Beta Emission Nebulae
  • Explore Scientific H-Beta Narrowband Filter 2" — view 2
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Explore Scientific

Explore Scientific H-Beta Narrowband Filter 2" — Boost Contrast on Hydrogen-Beta Emission Nebulae

Explore Scientific H-Beta Narrowband Filter 2" — Boost Contrast on Hydrogen-Beta Emission Nebulae

$145.00
$179.99 $145.00
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The Explore Scientific H-Beta Filter (2") is a specialty nebula filter that isolates the blue-green light of hydrogen-beta (H-Beta, 486nm). It boosts contrast on a select group of faint nebulae that emit strongly at this wavelength — most famously the Horsehead Nebula and the California Nebula — making them easier to see and image against a dark background.

Who it's for

Experienced deep-sky observers and imagers chasing the specific "H-Beta objects" that other filters struggle to reveal. It's a specialist tool rather than an everyday filter. New to nebula filters? See our guide to the best telescope filters for beginners.

Key features

  • Isolates the H-Beta line (486nm) to boost contrast on H-Beta-emitting nebulae
  • Reveals tough targets like the Horsehead and California nebulae
  • Darkens the background sky for better contrast under light pollution
  • 2" threaded cell — fits 2" eyepieces, diagonals, and filter systems

Specifications

Type H-Beta specialty nebula filter
Emission line H-Beta (486 nm)
Best for Horsehead, California, and other H-Beta nebulae
Fitting 2" threaded
SKU 310230

Frequently asked questions

Is this a general-purpose nebula filter?
No — H-Beta is a specialist filter for the small set of nebulae that emit strongly in H-Beta. For broad use, an O-III or broadband light-pollution filter is more versatile.

Which objects benefit most?
The Horsehead Nebula and California Nebula are the classic H-Beta targets, along with a handful of other faint emission nebulae.

Does it fit 1.25" eyepieces?
This is the 2" version. Use a 2"-to-1.25" adapter if needed for smaller eyepieces or filter wheels.

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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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