The Askar Color Magic 3nm Narrowband Filters are a new set of astronomy filters from Askar. These dedicated astronomy filters can effectively eliminate the influence from background light and enhance astro images.
The new Askar Color Magic 3nm Narrowband Filters include:
Askar 3nm SII Filter
Askar 3nm SII filter has an ultra-high transmittance over 90% at its center wavelength (672nm). The highly narrow 3nm bandwidth ensures this filter effectively blocks out light pollution or other distracting factors such as night glow.
Specifications include:
– 3nm SII Filter 2”
– FWHM: 3nm
– CWL: 672nm
– Peak transmittance: 90%
– Barrier property: ≥OD5 @ 200-1100nm
– Thickness: 1.85 ± 0.05mm
– Surface finish: 60/40
– Parallelism: 30″
Askar 3nm H-alpha Filter
The Askar H-alpha filter has a center wavelength of 656.3nm, where it has an ultra-high transmittance of over 90%. If you want to image nebulae or supernova remnants with H-alpha particles, then the Askar H-alpha(Ha) 3nm filter is an excellent tool.
Specifications include:
– 3nm H-alpha 2”
– FWHM: 3nm
– CWL: 656.3nm
– Peak transmittance: 90%
– Barrier property: ≥OD5 @ 200-1100nm
– Thickness: 1.85 ± 0.05mm
– Surface finish: 60/40
– Parallelism: 30″
Askar 3nm OIII Filter
The Askar OIII narrowband filter has a center wavelength of 500.7nm, where it has an ultra-high transmittance over 90%. The Askar OIII narrowband filter is suitable for images nebulae and supernova remnants that release OIII particles.
Specifications include:
– 3nm OIII 2”
– FWHM: 3nm
– CWL: 500.7nm
– Peak transmittance: 90%
– Barrier property: ≥OD5 @ 200-1100nm
– Thickness: 1.85 ± 0.05mm
– Surface finish: 60/40
– Parallelism: 30″
Askar 3nm Duo-Band Filter
The Askar 3nm duo-band filter has an extremely narrow bandwidth and an ultra-high transmittance over 88% at its center wavelength (500.7nm and 656.3nm). The Askar 3nm duo-band filter is designed for photographing emission nebulae, planetary nebulae or supernova remnants and has a very high transmittance at the central wavelength. The high narrow bandwidth of the filter effectively blocks out the effects of light pollution or other distracting factors such as night glow.
Specifications include:
– 3nm Duo-Band Filter 2”
– FWHM: 3nm
– CWL: 500.7nm & 656.3nm
– Peak transmittance: 88%
– Thickness: 1.85 ± 0.05mm
– Barrier property: ≥OD5 @ 200-1100nm
– Surface finish: 60/40
– Parallelism: 30″
You can learn more about the Askar Color Magic 3nm Narrowband Filters here.
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