The ATIK Narrowband 1.25" filters 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 any Atik mono camera (with the exception of the Atik GP).
The ATIK Narrowband 1.25" 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.
ATIK Narrowband 1.25" Specifications
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
| 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% |
SKU: ATK0203