2" H-Alpha SII OIII 7nm Filter Set
ZWO
From ~$255.05
4 stores
The ZWO 2" H-Alpha SII OIII 7nm Filter Set is a professional-grade narrowband imaging filter set designed for capturing high-contrast deep-sky images of emission nebulae, planetary nebulae, and supernova remnants, even in light-polluted skies. Each of the three filters (H-Alpha at 656nm, SII at 672nm, and OIII at 500nm) features a narrow 7nm passband with >80% peak transmission and is fine-optically polished to ensure precise 1/4-wave optical quality. These filters are ideal for monochrome CCD astrophotography and can be combined with LRGB imaging for full-color detailed results, while also blocking UV and IR light for sharp star images.
Astronomy Plus
7nm Narrowband SHO Filters (Ha, OIII & SII)
Worldwide shipping
CA$349.00
~$255.05
High Point Scientific
ZWO 2" H-Alpha, SII, OIII 7nm Filter Set
Ships to US only
$799.00
First Light Optics
ZWO 2" Ha SII OIII 7nm Narrowband Filter Set
Worldwide shipping
£734.00
~$989.40
Astroshop.eu
Filters Narrowband Filter Set H-alpha, SII, OIII 2"
Worldwide shipping
€969.00
~$1,142.35
Specifications
| Filter Size | 2 in |
| Filter Thread | M48x0.75 |
| UV/IR Blocking | ✓ |
| SII Wavelength | 672 |
| Total Thickness | 7.5 mm |
| Optical Length | 5 mm |
| Bandwidth (FWHM) | 7 |
| Glass Thickness | 2 mm |
| Filters Included | 3 (H-Alpha, SII, OIII) |
| H-Alpha Wavelength | 656 |
| Wavefront Quality | 1/4 wave |
| OIII Wavelength | 500 |
| Multicoated | ✓ |
| H-Alpha Transmission | 80 |