Contrast filter for Sun observation

 Contrast filter for Sun observation
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Picture of Altair 2nm G-Band Solar Contrast Filter - 1.25" 430.3nm

Altair 2nm G-Band Solar Contrast Filter - 1.25" 430.3nm

Another first for solar astronomy, the Altair G-Band 2nm Solar filter enhances finer details in the solar photosphere.

Altair 2nm G-Band Solar Contrast Filter filter specifications: 

  • Standard 1.25" Filter Threaded Aluminium Cell
  • CWL 430.3nm @ 96% transmission, tolerance 1%
  • FWHM 2nm, tolerance 0.5nm.
  • 1.85mm thick quartz ?/4, Parallelism (arcsec) 30"
  • Si02 "hard" overcoat with UVIR Block 300-1100nm and Anti-Reflection Coating
  • High resolution spectrographic test report included corresponding to each individual filter.
239.00 €
Delivery date : 1 week
Picture of Altair Solar Contrast Booster Filter 8nm 540nm Continuum 1.25"

Altair Solar Contrast Booster Filter 8nm 540nm Continuum 1.25"

The Altair 1.25" Solar Continuum filter Enhances sunspots, granulation, and fine photosphere detail. For use with Baader Solar Filter or Herschel Wedge.
89.00 €
Delivery date : 1-2 weeks
Picture of Altair Solar Contrast Booster Filter 8nm 540nm Continuum 2"

Altair Solar Contrast Booster Filter 8nm 540nm Continuum 2"

The Altair 2" Solar Continuum filter Enhances sunspots, granulation, and fine photosphere detail. For use with Baader Solar Filter or Herschel Wedge.
169.00 €
Delivery date : 3-4 days
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