• 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"
1 3

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
Sale Sold out
Shipping calculated at checkout.

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.

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.
Most orders ship within 5 business days. You'll receive tracking information within 24 hours of your order leaving the warehouse. For full details, visit our Shipping Policy.
Orders cancelled after 48 hours are subject to a $20 administration fee. If your order has shipped, you are responsible for return shipping costs. Refunds are issued to the original payment method. See our full Refund Policy for details.
Yes! If you find a lower price at another authorized online retailer within 6 months of your purchase, we'll refund the difference. 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 package on arrival and note any damage when signing for delivery. Send photos to info@telescopewolves.com and we'll process a claim on your behalf.
Absolutely. Our team is available Monday to Friday, 9am–5pm EST. The best way to reach us is by live chat (in the bottom right hand corner) or by email at info@telescopewolves.com. You can also visit our Contact Us Page.