The Atik narrow band filters are manufactured with a band pass of 7nm, capturing a nebula's photons while preventing a large portion of the broad band light pollution from entering. 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).
| 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% |
