• SVBONY SV220 2" 3nm H-Alpha & O-III Dual Narrowband Filter — High-Contrast Nebula Filter for Astrophotography
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Svbony

SVBONY SV220 2" 3nm H-Alpha & O-III Dual Narrowband Filter — High-Contrast Nebula Filter for Astrophotography

SVBONY SV220 2" 3nm H-Alpha & O-III Dual Narrowband Filter — High-Contrast Nebula Filter for Astrophotography

$299.99
$299.99
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The SVBONY SV220 2-inch 3nm dual narrowband filter delivers maximum nebula contrast for one-shot-color astrophotography, even under heavy light pollution or bright moonlight. Its ultra-tight 3nm passbands isolate just hydrogen-alpha (H-alpha) and oxygen-III (O-III), crushing skyglow and star bloat so faint emission nebulae stand out dramatically against a dark background — all captured in a single pass with a color camera. It threads into standard 2-inch filter mounts.

Who it's for
OSC-camera imagers who want the strongest possible contrast and skyglow rejection on emission nebulae. New to filters? See our guide to telescope filters.

  • Ultra-narrow 3nm bands: isolate H-alpha and O-III for maximum contrast.
  • Beats heavy light pollution: excellent even under moonlight and bright skies.
  • OSC-friendly: captures both lines in one pass with a color camera.
  • Tight stars, dark background: faint nebulosity really stands out.
  • 2-inch thread: fits standard 2" filter drawers, wheels, and adapters.
Specifications
Type Dual narrowband filter (H-alpha + O-III)
Bandwidth 3nm (ultra-narrow)
Best For OSC cameras; heavy light pollution / moonlight
Size 2" (threaded)
Model / SKU SV220 2" 3nm (W9198B)

How is 3nm different from the standard dual-band?
The narrower 3nm windows reject far more skyglow and moonlight for higher contrast, at the cost of slightly longer exposures.

Do I need a mono camera?
No — it's designed for one-shot-color cameras, capturing both lines at once.

When is 3nm worth it?
Under bright moonlight or heavy light pollution, or when you want the darkest background and highest contrast on emission nebulae.

Will it fit my imaging train?
Yes — the 2-inch thread fits standard filter drawers, wheels, and adapters.

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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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