ALTAIR F200S265CCD 2" 6.5 nm SII narrowband filter
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 light pollution wavelengths. The filter blocks UV IR and has an AR anti-reflection coating.
Carrier | Description | Estimated Delivery | ||
---|---|---|---|---|
Home delivery - International | Home delivery - International |
Monday, 23 December - Monday, 30 December |
Home delivery - International
Home delivery - International
Estimated delivery:
Monday, 23 December - Monday, 30 December
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 light pollution wavelengths. The filter blocks UV IR and has an AR anti-reflection coating.
Purchasing the complete SHO set provides significant cost savings versus purchasing the filters separately.
A 6.5nm to 7nm FHWM provides higher contrast compared to 12nm FHWM filters, e.g. for better performance in heavily light-polluted urban areas, and higher contrast for imaging faint objects. Emission lines from artificial illumination (mercury (Hg) and sodium (Na)), as well as sky glow, are completely suppressed, allowing long exposures in urban conditions. LED illumination outside the Oiii bandpass is also blocked.
Steep transmission curves with narrow pass bands provide high image contrast. Advanced UV/IR blocking coatings allow small size stars to be obtained even with refractor optics.
Technical specifications:
- AR (anti-reflection) coatings suppress halo effects and internal reflections for more pleasing star images.
- Ultra-thin BK7 glass housed in a precision CNC-machined filter cell for stress-free, tilt-free mounting.
- Filters are 1.85 mm thick, 1/4-wave flatness and 30 arc-second parallelism.