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Svbony SV220 Dual-Band 3nm H-Alpha & OIII Nebula Filter - W9198

Select Size

From $29.19

Original: $83.39

-65%

Svbony SV220 Dual-Band 3nm H-Alpha & OIII Nebula Filter - W9198—

$83.39

$29.19

Select Size

From $29.19

Original: $83.39

-65%

Svbony SV220 Dual-Band 3nm H-Alpha & OIII Nebula Filter - W9198—

$83.39

$29.19

The Story

The SVBONY SV220 3nm Dual Narrowband Filter (H-Alpha & OIII) is engineered for deep-sky astrophotography in both light-polluted and dark-sky environments.
Featuring an ultra-narrow 3 ± 1 nm bandwidth for both Ha (656.3 nm) and OIII (500.7 nm), the filter dramatically increases contrast and signal-to-noise ratio by suppressing sky glow, stray light, and major light-pollution bands from 300–1050 nm.

Whether you're imaging emission nebulae, planetary nebulae, or rich Ha/OIII structures, the SV220 delivers high transmission (>85%), minimal halos, and crisp detail. Its premium multi-layer coatings ensure excellent color accuracy and balanced star profiles — even with fast optics.

Available in 1.25" and 2" formats.

Key Features

Ultra-narrow 3nm (Ha + OIII) dual band – Ideal for emission & planetary nebulae
Minimal halo multi-layer coating – Reduces glare, boosts contrast & color accuracy
High peak transmission (≥85%) – Shorter exposures, stronger signal
OD5 light-pollution suppression – Blocks UV, visible LP, and NIR up to 1050 nm
Great for heavy light pollution – Excellent performance in Bortle 7–9 cities
Compatible with all major astro cameras and filter wheels
Full-frame compatible (2") – Reduced vignetting with wide-angle lenses
Precision optical quality – λ/4 wavefront, 60/40 surface quality, 30″ parallelism

Variants:

⭐ W9198A – SV220 1.25" 3nm Dual Narrowband Filter

Specifications

Item	Value
Size	1.25"
Mirror Ring Size	Φ31.75 × 7 mm
Thread Type	Male
Thread Spec	M28.5 × 0.6
Material	6061-T Aluminum
Substrate Thickness	2.0 mm
Clear Aperture	26 mm
Center Wavelengths	500.7 nm & 656.3 nm
Bandwidth (FWHM)	3 ± 1 nm (Ha & OIII)
Cutoff Wavelength	300–1050 nm
Cutoff Depth	Average OD5
Peak Transmission	≥85%
Surface Quality	60/40
Wavefront	PV ≤ λ/4
Parallelism	30″
Weight	7 g

⭐ W9198B – SV220 2" 3nm Dual Narrowband Filter

Specifications

Item	Value
Size	2"
Mirror Ring Size	Φ50.8 × 7 mm
Thread Type	Male
Thread Spec	M48 × 0.75
Material	6061-T Aluminum
Substrate Thickness	2.0 mm
Clear Aperture	44 mm
Center Wavelengths	500.7 nm & 656.3 nm
Bandwidth (FWHM)	3 ± 1 nm (Ha & OIII)
Cutoff Wavelength	300–1050 nm
Cutoff Depth	Average OD5
Peak Transmission	≥85%
Surface Quality	60/40
Wavefront	PV ≤ λ/4
Parallelism	30″
Weight	12.5 g

Performance

Sharp nebula structure with excellent contrast
Reduced star halos due to precision coating design
Improved color purity for Ha/OIII composite imaging
Works exceptionally well with fast refractors, Newtonians, and astrographs
Suitable for OSC, mono cameras, and full-frame sensors

What’s Included

SVBONY SV220 3nm Dual Narrowband Filter
Protective plastic filter case
Factory inspection certificate

Ideal For

✔ Emission Nebulae
✔ Planetary Nebulae
✔ Supernova Remnants
✔ Star-forming Regions
✔ Urban Light-Polluted Imaging
✔ Fast Optics (f/2–f/7)