Askar Colour Magic Super 6nm 2" D1 Duo Narrowband Filter (Sii/OIII)

Product code: ASKAR-D1-2INCH-SiiOIII
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£320.00 UK Price
£266.67 (ex. VAT) International Price
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Product information

When shooting deep-sky galaxies with colour cameras, a duo-narrowband filter in the Hα and OⅢ bands is often used; whereas with a mono camera, a narrowband filter in the Hα, SⅡ and OⅢ bands is often used, leaving users with colour cameras missing one band of nebula detail. This can be compensated by using ColourMagic Super D2 Duo-narrowband filter (OⅢ+SⅡ) mentioned above.

ColourMagic Super D2 Duo-narrowband filter (OⅢ+SⅡ) has an ultra-high transmittance over 85% at its center wavelength (500.7nm and 672nm). It can effectively enhance the contrast of your pictures, making it easier to display the details of the stars that otherwise are fairly difficult to spot. In areas with very serious light pollution, this filter can also selectively filter light pollution and cluttered signals through the emission lights of the nebula to achieve the ideal shooting effect.

Although it is not a specific high speed filter, through our real test, the Super D Duo-narrowband filter behaves well when using together with a fast telescope even at f/1.9.

Specifications

D2 Duo-narrowband Filter (OIII & SII) 2”

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”

C Filters VS D Filters

D Transmittance

Product Info

Brand ASKAR
Product Code ASKAR-D1-2INCH-SiiOIII
Delivery Weight Package
0.2kg