Altair Astro Premium Narrowband 6.5nm SII CCD Filter 1.25"

Product code: F125PSII6.5CCD
£85.00
£70.83 (ex. VAT)
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Product information

The Altair Astro Premium SII 6.5 CCD 1.25" filter is designed for astro imaging with Mono CCD or CMOS cameras. 
 
(This filter is also available as part of an SOH set enabling cost savings compared to purchasing the filters separately).
 
Designed for monochrome imaging of nebulae. Eliminates light pollution by avoiding the light pollution wavelengths.
 
The 6.5nm FHWM yields higher contrast compared to say 12nm FHWM filters. This allows better performance within heavily light-polluted urban areas, or for imaging faint objects. The emission lines of artificial lighting (mercury (Hg) and sodium (Na) as well as skyglow are completely suppressed, allowing for long exposures in urban conditions. 
 
Features precise and steep transmission curves with narrow pass-bands to ensure high image contrast. 
 
Aside from the high qualty Schott German glass and top quality coatings, these filters have some additional enhancements which make them ideal for your astro imaging application.
 
Advanced UV/IR blocking give small star sizes even with refractor optics, and AR (Anti Reflection) coatings reduce halo effects and internal reflections for more pleasing star images.
 
Premium filter features:
  • Batch-tested for consistency.
  • High quality dichroic/dielectric coatings. 
  • Anti-Reflection coating to reduce star-halos - stackable.
  • UV/IR block for imaging - star bloat reduction with refractors.
  • Ultra-flat glass by Schott Germany.
  • Precision CNC machined filter cell for strain-free mounting and freedom from tilt.

Technical specifications

Brand Altair
Product Code F125PSII6.5CCD