Askar ColourMagic 2" Super D2 Duo Narrowband Filter (OIII&SII)

£320.00✓ 2 year warranty

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About this product

Model: askar_duo_6nm_d2
Part Number: ASK2DNSOD2

The ColourMagic Duo Band has high OIII and SII 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 / SII 8.5nm ±0.5nm
CWL: 500.7nm & 672nm
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.