SV220 H-Alpha/O-III 7nm Dual-Band Filter 2"
SVBONY
~$122.78
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In stock
The SVBONY SV220 is a dual-band narrowband filter designed specifically for imaging emission nebulae, planetary nebulae, and supernova remnants in light-polluted skies. With 7nm passbands centered on H-Alpha (656.3nm) and O-III (500.7nm) emission lines, it enables single-exposure color imaging on one-shot color cameras without requiring complex multi-filter workflows. The filter's sharp cut-off and high transmission (>94%) dramatically enhances contrast and suppresses light pollution, moonlight, and artificial street lighting, making it an excellent entry-level tool for nebula astrophotography from urban locations.
Specifications
| Weight | 12.5 lb |
| Filter Size | 2 in |
| O-III Center Wavelength | 500.7 |
| Substrate Thickness | 1.80 mm |
| Surface Quality | 60/40 |
| H-Alpha Bandwidth | 7 |
| Filter Thread | M48 x 0.75 |
| Surface Parallelism | 1″ |
| H-Alpha Center Wavelength | 656.3 |
| Clear Aperture | 44 mm |
| Wavelength Range | 300 |
| O-III Bandwidth | 7 |
| Single Thread | ✓ |