SV132 H-Beta Filter 25nm 1.25inch Light Pollution Filter
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Key Features
- Faint Nebula Observation
- High-Precision Optical Polishing
- Light Pollution Rejection
- Uniform Coating & Optical Quality
- Universal 1.25" Compatibility
⚡ Shipped: 72 hrs after ordering (Pre-sale products excluded).
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| Model | W9102A |
| Size | 1.25'' |
| Thread Size | M28.5*0.6 |
| Blocking area | 400-700nm |
| Transmittance | 80% at 486nm |
| Transmission Hg | 0.1% at 435nm and 578nm |
| Transmission Na | 0.1% at 589nm |
| FWHM | 25±3nm |
| Thickness | 1.85mm |
1. Each Svbony filter has an ultra hard, vacuum-deposited coating carefully designed to observe the Orion Horsehead Nebula and the California Nebula, which are difficult to capture. This eliminates the un-natural colored halos surrounding bright stars common with H-Beta filters of less sophisticated coating technology
2. The 1.25'' Svbony H-Beta filters suitable for viewing bright nebulae, and matching with large-aperture telescopes to observe linear spectrum nebulae,such as the M42 Orion Nebula under severe light pollution, emission nebulae, planetary stars & supernova remnants
3. Suitable for viewing on the faint and elusive Horsehead Nebula and California Nebula
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