Askar ColourMagic 2'' Super D1 Duo Narrowband Filter (OIII&Ha)

Askar ColourMagic 2" Super D1 Duo Narrowband Filter (OIII&Ha)

  (1 Review)
✓ 2 year warranty


2x in stock shipped 1-2 working days

About this product

Model:  askar_duo_6nm

The ColourMagic Duo Band has high Ha and OIII transmission and is ideal for narrowband imaging with colour cameras.

Askar's newly launched ColourMagic Super D 2" Duo-narrowband filters are specifically designed for deep-sky imaging.

As the name suggests, the Super D filters have "Super" halo control.

During the filter research and development, Askar made a 'special design optimisation' for Super D filters.

The filters provide one bandwidth at 6nm and the other outside 6nm. 


FWHM:  OIII 6.5nm ±0.5nm / Ha 8.5nm ±0.5nm
CWL:  500.7nm & 656.6nm
Peak transmittance:  85%
Thickness:  1.85 ± 0.05mm
Barrier property:  ≥OD5 @ 200-1100nm
Surface finish:  60/40
Parallelism:  30”


Further Notes
Users will have remarkable results When shooting data through dual-band filters (D1 and D2) and a colour camera.
Usually, in astrophotography, the Hα signal-to-noise ratio is stronger, while the OIII is relatively weak. As our two duo-narrowband filters are Hα+OIII and SII+OIII, the combination can balance the signal-to-noise ratio of each channel when shooting data. After image processing, it can achieve an excellent result, almost as good as shooting with a combination of three narrowband filters and a mono camera.
Here is a link detailing how to process D1 and D2 Data in Pixinsight. 

Customer reviews

Average Rating (1 Review):  
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Askar Colour Magic Duoband Ha/Oii filter
07 January 2023  | 

It arrived very quickly despite my ordering in the Inbetween days of Christmas looking very pretty in it's little box. Unfortunately FLO over did the clouds in the packaging so I have not been able to try it out but I'm hoping it's will be better at filterimg out light pollution and not the the halos that my Optolong L-enhance has and I intend to buy the Ha/S version to try SHO etc proper narrowband images with my OSC.


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