S-II Filters

The S-II line of the simply ionized sulfur is deep red (671nm and 673nm), not as prominent as H-alpha but nevertheless very interesting, as very fine details are visible here in different objects.

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The Altair Astro Premium Sii 6.5nm filter is designed for astro imaging of nebulae with Mono CCD or CMOS cameras, blocking light pollution by cutting out the light pollution wavelengths. The filter blocks UV IR and has an anti-reflection AR coating.
 
167.23 €
Delivery date : 3-4 days

Antlia 1.25" 3 nm S-II ultra - narrow band filter for astrophotography - images with extreme contrast even with strong light pollution

  • 1.25" mounted with low-profile filter cell
  • Suitable for telescopes and lenses with a focal ratio of f/3 and lower
  • Schott optical base substrate
  • Blackened edges to avoid internal reflections
  • Extremely narrow bandwidth of only 3 nm for maximum contrast
  • Central wavelength 671,6 nm
  • Filter thickness 2 mm
  • Comes in convenient plastic transport box
310.92 €
Delivery date : 1-4 days

Antlia 2" 3 nm S-II ultra - narrow band filter for astrophotography - images with extreme contrast even with strong light pollution

  • 2" mounted with low-profile filter cell
  • Suitable for telescopes and lenses with a focal ratio of f/3 and lower
  • Schott optical base substrate
  • Blackened edges to avoid internal reflections
  • Extremely narrow bandwidth of only 3 nm for maximum contrast
  • Central wavelength 671,6 nm
  • Filter thickness 2 mm
  • Comes in convenient plastic transport box
498.32 €
Delivery date : 1-4 days

AstrodonSII3_27R Narrowband Filter for Astrophotography

  • 1,25" Narrowband Filter - mounted
  • Emission line: H-Alpha 3nm bandwidth
  • Thickness: 3mm - parfokal with all other Astrodon filters
  • Transmission: better than 90%
  • Best possible anti-reflection coating against halos around bright stars and ghost images
876.47 €
Delivery date : 1-2 weeks

Astrodon HA5_27R Narrowband Filter for Astrophotography

  • 1,25" Narrowband Filter - mounted
  • Emission line: H-Alpha 5nm bandwidth
  • Thickness: 3mm - parfokal with all other Astrodon filters
  • Transmission: better than 90%
  • Best possible anti-reflection coating against halos around bright stars and ghost images
569.75 €
Delivery date : 3-4 days
Astronomik SII CCD Filter, 12 nm, Clip-Filter EOS XL
268.07 €
Delivery date : 1-4 days
Astronomik SII CCD Filter, 12 nm, 1.25 inch mounted
116.81 €
Delivery date : 1-4 days
Astronomik SII CCD Filter, 12 nm, 2 inch mounted
251.26 €
Delivery date : 1-4 days
Astronomik SII CCD Filter, 12 nm, Clip-Filter EOS APS-C
167.23 €
Delivery date : 1-4 days
Astronomik SII CCD Filter, 6 nm, Clip-Filter EOS XL
419.33 €
Delivery date : 1-4 days
Astronomik SII CCD Filter, 6 nm, 1.25 inch mounted
167.23 €
Delivery date : 1-4 days
Astronomik SII CCD Filter, 6 nm, 2 inch mounted
410.92 €
Delivery date : 1-4 days