Narrowband Filter 3nm H-Alpha & OIII SV220 2inch | Svbony
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Key Features
- Precision Narrowband Imaging
- High Transmission Rate
- Compatible with Various Telescopes
- Durable and Reliable Construction
- Perfect for Deep-Sky Astrophotography
- In Stock, Ready to Ship
⚡ Shipped: 72 hrs after ordering (Pre-sale products excluded).
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SV220 2inch 3nm Narrowband filter
Minimal Halo Coating Design
This narrowband filter Adopts multi-layer minimal halo coating technology, it reduces glare and halo interference. It thereby enhances image contrast and color accuracy, presents sharp celestial details against a clean background, and improves the purity of deep-sky photography images.
Full-Frame Compatible + Ultra-Wide-Angle Adaptable
This light pollution filter is specially designed for full-frame sensors, compatible with mainstream astronomical cameras. It effectively reduces vignetting in ultra-wide-angle lenses, ensuring uniform brightness from the edge to the center of the image and presenting the complete view of nebulae and galaxies.
SV220 2inch 3nm Narrowband filter
Minimal Halo Coating Design
This narrowband filter Adopts multi-layer minimal halo coating technology, it reduces glare and halo interference. It thereby enhances image contrast and color accuracy, presents sharp celestial details against a clean background, and improves the purity of deep-sky photography images.Full-Frame Compatible + Ultra-Wide-Angle Adaptable
This light pollution filter is specially designed for full-frame sensors, compatible with mainstream astronomical cameras. It effectively reduces vignetting in ultra-wide-angle lenses, ensuring uniform brightness from the edge to the center of the image and presenting the complete view of nebulae and galaxies.
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| Product Size | 2 inches |
| Mirror Ring Dimensions | Φ50.8 × 7 mm |
| Thread Type | Single Thread/Male Thread |
| Thread Specifications | M48 × 0.75 mm |
| Material | 6061T Aluminum Extrusion |
| Substrate Thickness | 2.0 mm |
| Light Transmission Aperture | 44 mm |
| Center Wavelength | 500.7/656.3 nm |
| Peak Transmittance | OIII, H-alpha average ≥85% |
| Bandwidth/Full Width at Half Maximum | OIII 3±1 nm, Ha 3±1 nm |
| Cutoff Wavelength | 300–1050 nm |
| Cutoff Depth | Average OD5 |
| Surface Quality | 60/40 |
| Surface Flatness | Transmitted Wavefront PV ≤ λ/4a |
| Parallelism | 30″ |
| Net Weight | 12.5g |
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