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.
 
226.00 €
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
371.00 €
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
584.00 €
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
1043.00 €
Delivery date : 1-4 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
678.00 €
Delivery date : 3-4 days
 
 
Astronomik SII CCD Filter, 12 nm, Clip-Filter EOS XL
319.00 €
Delivery date : 1-4 days
 
 
Astronomik SII CCD Filter, 12 nm, 1.25 inch mounted
139.00 €
Delivery date : 1-4 days
 
 
Astronomik SII CCD Filter, 12 nm, 2 inch mounted
299.00 €
Delivery date : 1-4 days
 
 
Astronomik SII CCD Filter, 12 nm, Clip-Filter EOS APS-C
199.00 €
Delivery date : 1-4 days
 
 
Astronomik SII CCD Filter, 6 nm, Clip-Filter EOS XL
499.00 €
Delivery date : 1-4 days
 
 
Astronomik SII CCD Filter, 6 nm, 1.25 inch mounted
199.00 €
Delivery date : 1-4 days
 
 
Astronomik SII CCD Filter, 6 nm, 2 inch mounted
489.00 €
Delivery date : 1-4 days