• Explore Scientific H-Alpha 12nm Narrowband Filter 1.25"
  • Explore Scientific H-Alpha 12nm Narrowband Filter 1.25"
  • Explore Scientific H-Alpha 12nm Narrowband Filter 1.25"
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Explore Scientific

Explore Scientific H-Alpha 12nm Narrowband Filter 1.25" — Deep-Sky Nebula Imaging Filter for CCD Cameras

Explore Scientific H-Alpha 12nm Narrowband Filter 1.25" — Deep-Sky Nebula Imaging Filter for CCD Cameras

$112.00
$159.99 $112.00
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Beginner HelpAsk us before you buy

The Explore Scientific H-Alpha 12nm Narrowband Filter (1.25") isolates the red light of hydrogen-alpha (H-Alpha, 656nm) — the wavelength that most emission nebulae glow brightest in — for high-contrast narrowband astrophotography. By passing only that line and blocking everything else, including light pollution and moonlight, it renders nebulae in striking detail against a dark sky.

Who it's for

Astrophotographers using monochrome (or modified) cameras who want the single most useful narrowband filter for emission nebulae. It's the best starting point for narrowband imaging. New to filters? See our guide to the best telescope filters for beginners.

Key features

  • Isolates the H-Alpha line (656nm) — the brightest emission line for most nebulae
  • 12nm bandwidth — versatile across a wide range of focal ratios
  • Excellent light-pollution and moonlight rejection — image even near full Moon
  • The best first narrowband filter, and part of the S-II / H-Alpha / O-III (SHO) set
  • 1.25" mounted and threaded for filter wheels and drawers

Specifications

Type Narrowband H-Alpha imaging filter
Emission line H-Alpha (656 nm)
Bandwidth 12 nm
Fitting 1.25" threaded
SKU 310135

Frequently asked questions

Why start with H-Alpha?
Most emission nebulae shine brightest in H-Alpha, so it delivers the most dramatic results and is the ideal first narrowband filter — even usable on its own for detailed monochrome nebula images.

What camera do I need?
It's designed for monochrome astronomy cameras (and works with H-Alpha-sensitive modified cameras). Pair with S-II and O-III for full-color SHO images.

Can I image under a bright Moon?
Yes — the narrow passband rejects most skyglow and moonlight, so H-Alpha imaging works even on bright nights.

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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.
Orders are usually processed within 1–2 business days, and standard delivery takes 4–8 business days after that. You'll receive a shipping confirmation email with your tracking number as soon as your order ships. Free standard shipping applies to the 48 contiguous US states. For full details, visit our Shipping Policy.
You have 30 days from delivery to request a return. Items must be unused, unassembled, and in their original packaging with all accessories. To start a return, email info@telescopewolves.com with your order number — returns sent without approval can't be accepted. For change-of-mind returns, you cover return shipping and a 5% restocking fee applies. Refunds go back to your original payment method. See our full Refund Policy for details.
Yes! If you find a lower advertised price on an identical, new, in-stock item from an authorized online retailer within one month of your purchase, we'll refund you the difference (item price plus shipping, excluding taxes). Just email info@telescopewolves.com with your order number and a link or screenshot of the lower price. Learn more on our Price Match Guarantee page.
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.
Please inspect your order as soon as it arrives. If anything is damaged, defective, or incorrect, email info@telescopewolves.com within 48 hours of delivery with your order number, a short description, and photos of the item, and we'll arrange a replacement or refund.
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