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

£320.00

(1 Review)

✓ 2 year warranty

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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.

Specifications

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

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Askar Colour Magic Duoband Ha/Oii filter

07 January 2023 | Danni

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.