Atik Narrowband Filter Set

Atik SKU: ATK0176


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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.



    • 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


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


Wavlength printout_Ha

Wavlength printout_OIII

Wavlength printout_SII

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