Bandwidth:
- SII 7nm
- Ha 7nm
- OIII 7nm
Peak Transmission: minimum 80%
CWL (centre of wavelength):
- Ha 656.3nm
- SII 671.6nm
- OIII 500.7nm
Size: 1.25” mounted, 36mm unmounted or 2” mounted
Transmitted Wavefront RMS: λ/4
Parallelism(arcsec): 30s
Narrow band Filter Set
The Atik narrow band filter are designed with a band pass of 7 nm to aid in capturing all a nebula’s photons while the vast majority of the broad band light pollution is stopped. The result is a much higher signal to noise revealing faint details in nebulas. The Narrow band filter set comprises of Hydrogen-Alpha (Ha), Sulphur (SII) and Oxygen (OIII). Take advantage of our special offer get 50% off any filter set (or both filter sets), when you buy and an Atik camera and and Atik filter wheel.
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The SHO narrow band filter set is compatible with our filter wheels and allows astrophotographers to capture deep-sky objects in spectacular narrow band. This filter set is commonly used to image objects in the Hubble pallet.
Bandwidth:
Peak Transmission: minimum 80%
CWL (centre of wavelength):
Size: 1.25” mounted, 36mm unmounted or 2” mounted
Transmitted Wavefront RMS: λ/4
Parallelism(arcsec): 30s
Bandwidth:
Peak Transmission: minimum 80%
CWL (centre of wavelength):
Size: 1.25” mounted, 36mm unmounted or 2” mounted
Transmitted Wavefront RMS: λ/4
Parallelism(arcsec): 30s
Technical Specification
| Filter | Peak Transmission | Half Width | Transmission in Band | Transmission out of Band |
| Hydrogen Alpha | 656.3nm | 7nm | >80% | Maximum＜0.3% Average 0.1% |
| Oxygen III | 500.7nm | 7nm | >80% | Maximum＜0.3% Average 0.1% |
| Sulphur II | 671.6nm | 7nm | >80% | Maximum＜0.3% Average 0.1% |
What's in the box?
Three Narrowband Filters
- Sulphur - SII 7nm
- Hydrogen-Alpha - Ha 7nm
- Oxygen - OIII 7nm