SVBONY SV115 O-III Filter
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The SVBONY SV115 is a 2-inch narrowband O-III filter designed to isolate the doubly ionized oxygen emission lines at 496nm and 501nm, making it highly effective for observing and imaging emission nebulae under light-polluted skies. It delivers strong contrast enhancement on objects like planetary nebulae and supernova remnants by blocking the majority of artificial light and sky glow. For the price point, it offers a compelling entry into narrowband filtering without the steep investment of premium brands.
Key Features & Specs
| Filter Type | O-III narrowband targeting doubly ionized oxygen emission at 496nm and 501nm |
|---|---|
| Bandwidth | Narrowband passband designed to block broadband light pollution and sky glow effectively |
| Size | 2-inch barrel format with standard threaded cell for wide compatibility |
| Construction | Multi-layer anti-reflection coated optical glass in a machined aluminum cell |
| Compatibility | Works with 2-inch focusers and camera filter wheels; suitable for visual and imaging use |
| Best Objects | Optimized for planetary nebulae, supernova remnants, and O-III-bright emission nebulae |
| Light Pollution | Blocks common sources including sodium and mercury vapor lamp emissions |
Best for: Amateur astronomers and astrophotographers living in or near light-polluted areas who want an affordable narrowband filter to enhance contrast on emission nebulae without committing to a high-end budget.