ToupTek SHO Narrowband Filter Set 1.25" 6.5nm - H-alpha OIII SII
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Vai al moduloToupTek SHO Filter Set 1.25" — Set of three precision narrowband filters with 6.5 nm bandpass, designed for astronomical imaging of emission nebulae with monochrome CCD and CMOS cameras.
Each filter perfectly isolates its spectral line, blocking light pollution and unwanted sky background radiation — effective even under heavily polluted skies and with full Moon present.
Included Filters:
- H-Alpha — 656.28 nm ± 0.3 nm
- [O III] — 500.7 nm & 495.9 nm ± 0.3 nm
- [S II] — 671.6 nm & 673.1 nm ± 0.3 nm
Key Features:
- 6.5 nm bandpass constant across all filters — optimizes the signal-to-noise ratio
- SCHOTT optical glass (Germany) 2 mm, polished on both sides for optimal flatness
- IAD multi-layer AR coating (Ion-Assisted Deposition) — transmission >90%, minimal halo, high durability
- Spectral precision ±0.3 nm — sharp and accurate cut of emission bands
- Matte black anodized aluminum cell — scratch and oxidation resistant
- Standard M28.5×0.6 thread — compatible with electronic 1.25" filter wheels
Perfect For:
- Hubble Palette (SHO) — Hα = green, OIII = blue, SII = red
- Diffuse nebulae: Orion, Heart, Rosette
- Planetary nebulae: M27 (Dumbbell), Helix (NGC 7293)
- Supernova remnants: Veil Nebula
- Narrowband imaging from urban and suburban sites with heavy light pollution
Technical Specifications:
| Parameter | Value |
|---|---|
| Included filters | H-Alpha, [O III], [S II] |
| H-Alpha wavelength | 656.28 nm ± 0.3 nm |
| [O III] wavelength | 500.7 nm & 495.9 nm ± 0.3 nm |
| [S II] wavelength | 671.6 nm & 673.1 nm ± 0.3 nm |
| Bandpass | 6.5 nm (constant) |
| Spectral tolerance | ± 0.3 nm |
| Glass | SCHOTT (Germany), 2 mm, polished both sides |
| Coating | IAD multi-layer AR — transmission >90% |
| Cell | Matte black anodized aluminum |
| Thread | M28.5×0.6 (standard 1.25") |
| Format | 1.25" (31.75 mm) |