Askar Color Magic C1 Duo-band 2" is a high-quality filter, the use of which allows you to dramatically improve the contrast and detail of photographs of nebular objects taken even in conditions of strong light pollution.

This filter allows light emitted by ionized oxygen (OIII) and hydrogen (Hα) atoms to pass through. By simultaneous exposure in both spectral ranges, it is possible to take great shots without the need for filter wheels or a dedicated set of separate filters.

Attention! The Askar Color Magic C1 Duo-band 2" filter is not recommended for visual observations. Under no circumstances should it be used as a solar filter.

The most important features of the Askar Color Magic C1 Duo-band 2" filter

• filter with transmittance of over 90 percent for the OIII and Hα bands
• excellent cutting of emission lines of mercury and sodium lamps thanks to high optical density equivalent (OD3)
• ideal for photographing emission and planetary nebulae

Technical parameters

• filter type: two-band filter
• Filter diameter: 2"
• filter thickness: 2 ± 0.05 mm
• filter shape: round
• passed bands: OIII, Hα
• location of the maximum transmittance peak for the OIII band (CWL): 500.7 nm
• half width for the OIII band (FWHM): 35 ± 5 nm
• maximum transmission for the OIII band: >90%
• location of the maximum transmittance peak for the Hα band (CWL): 656.3 nm
• half width for the Hα band (FWHM): 15 ± 3 nm
• maximum transmission for the Hα band: >90%
• blocked bands: mercury lamps (435.8 nm, 546.1 nm, 577 nm, 578.1 nm), sodium lamps (598 nm, 589.6 nm, 615.4 nm, 616.1 nm)
• optical density equivalent for blocked lines: OD3 (200 - 1000 nm)
• surface quality index: 60/40

Set elements

• Askar Color Magic C1 Duo-band 2" filter

Guarantee

24 months