Askar Color Magic Ultra E2 Duo Narrowband S-II & O-III Imaging Filter - 2" Mounted
Stock count is accurate & shown in real time.
- This item is out of stock.
- Sign up for back-in-stock alerts to be notified when this item becomes available (account login required).
- This item is out of stock.
- Sign up for back-in-stock alerts to be notified when this item becomes available (account login required).
Contiguous US / Lower 48:
Free shipping applies to orders over $50 using our chosen carrier/method. Faster paid options are available at checkout.
Alaska, Hawaii & US Territories:
Free shipping applies to many—but not all—products. Enter your ZIP code in cart or upon checkout to confirm options and costs.
International:
International orders do not qualify for free shipping. Shipping, duties, brokerage, tariffs, and taxes are the customer’s responsibility. Some items may be restricted due to export, size, or manufacturer limitations.
ColourMagic Ultra E 2" Duo-narrowband filter, is a professional astrophotography tool specifically designed for deep-sky imaging. Except for the traditional Hα+OⅢ Duo-narrowband filter, we innovatively introduced another filter--SⅡ+OⅢ. The ColourMagic Ultra E2 filter is a SII+OIII filter.
The Ultra E filter, as the name suggests, has the "Ultra" halo control capability. During the filter research and development process, we made a special design optimization for Ultra E. And in the end, it became a special filter with one bandwidth at 3nm and the other bandwidth outside 3nm.
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 Ultra E2 Duo-narrowband filter (OⅢ+SⅡ) mentioned above.
ColourMagic Ultra E2 Duo-narrowband filter (Oâ…¢+Sâ…¡) has an ultra-high transmittance of 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.
Specifications
- FWHM:SII: 4.0nm ± 0.3nm \ OIII: 3.7nm ± 0.3nm
- Central Wavelengths (CWL): 500.7nm & 672nm
- Peak Transmittance: 85%
- Thickness: 1.85 ± 0.05mm
- Barrier Property: ≥OD5 @ 200–1100nm
- Surface Finish: 60/40
- Parallelism: 30″
Parameter Diagram
Useful Resources
Filter Cell Specifications
D = Filter Cell Diameter = 50.5 mm / 1.98 in
T = Total Filter Height = 7.6 mm / 0.29 in
C = Filter Cell Height (Excluding Male Thread) = 5 mm / 0.19 in
M = Male Thread Length = 2.7 mm / 0.10 in
F = USABLE Female Filter Thread Length = Not threaded, so you cannot stack additional filters
S = Glass Substrate Thickness = 1.87 mm / 0.07 in
CA = Clear Aperture = 44 mm / 1.73 in
Other Information
- Country of Manufacture: China
ColourMagic Ultra E 2" Duo-narrowband filter, is a professional astrophotography tool specifically designed for deep-sky imaging. Except for the traditional Hα+OⅢ Duo-narrowband filter, we innovatively introduced another filter--SⅡ+OⅢ. The ColourMagic Ultra E2 filter is a SII+OIII filter.
The Ultra E filter, as the name suggests, has the "Ultra" halo control capability. During the filter research and development process, we made a special design optimization for Ultra E. And in the end, it became a special filter with one bandwidth at 3nm and the other bandwidth outside 3nm.
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 Ultra E2 Duo-narrowband filter (OⅢ+SⅡ) mentioned above.
ColourMagic Ultra E2 Duo-narrowband filter (Oâ…¢+Sâ…¡) has an ultra-high transmittance of 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.
Specifications
- FWHM:SII: 4.0nm ± 0.3nm \ OIII: 3.7nm ± 0.3nm
- Central Wavelengths (CWL): 500.7nm & 672nm
- Peak Transmittance: 85%
- Thickness: 1.85 ± 0.05mm
- Barrier Property: ≥OD5 @ 200–1100nm
- Surface Finish: 60/40
- Parallelism: 30″
Parameter Diagram
ColourMagic Ultra E 2" Duo-narrowband filter, is a professional astrophotography tool specifically designed for deep-sky imaging. Except for the traditional Hα+OⅢ Duo-narrowband filter, we innovatively introduced another filter--SⅡ+OⅢ. The ColourMagic Ultra E2 filter is a SII+OIII filter.
The Ultra E filter, as the name suggests, has the "Ultra" halo control capability. During the filter research and development process, we made a special design optimization for Ultra E. And in the end, it became a special filter with one bandwidth at 3nm and the other bandwidth outside 3nm.
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 Ultra E2 Duo-narrowband filter (OⅢ+SⅡ) mentioned above.
ColourMagic Ultra E2 Duo-narrowband filter (Oâ…¢+Sâ…¡) has an ultra-high transmittance of 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.
Specifications
- FWHM:SII: 4.0nm ± 0.3nm \ OIII: 3.7nm ± 0.3nm
- Central Wavelengths (CWL): 500.7nm & 672nm
- Peak Transmittance: 85%
- Thickness: 1.85 ± 0.05mm
- Barrier Property: ≥OD5 @ 200–1100nm
- Surface Finish: 60/40
- Parallelism: 30″
Parameter Diagram
Useful Resources
Filter Cell Specifications
D = Filter Cell Diameter = 50.5 mm / 1.98 in
T = Total Filter Height = 7.6 mm / 0.29 in
C = Filter Cell Height (Excluding Male Thread) = 5 mm / 0.19 in
M = Male Thread Length = 2.7 mm / 0.10 in
F = USABLE Female Filter Thread Length = Not threaded, so you cannot stack additional filters
S = Glass Substrate Thickness = 1.87 mm / 0.07 in
CA = Clear Aperture = 44 mm / 1.73 in
Other Information
- Country of Manufacture: China
Askar Color Magic Ultra E2 Duo Narrowband S-II & O-III Imaging Filter - 2" Mounted