Askar Colour Magic 2" Duo-Narrowband 6nm Filter - Ha and OIII
Duo Narrowband One-Shot Color Magic From Askar - D1 OIII & Ha 2"
The Askar Color Magic Super Duo Narrowband Filters combine their "Super" halo control technology, high transmittance, and narrowband passes with an interesting approach to obtaining SHO data from one-shot color cameras. This D1 filter from their Super D series captures Ha and OIII, allowing you to cut through light pollution and reveal the stunning detail of the deep-sky objects shrouded behind!
Askar's imaging filters are excellent standalone narrowband duo band filters in their own right, excelling at capturing nebulae with their 8.5nm band passes for Ha on the D1 and SII on the D2 and 6.5nm for OIII for both; however the Super D series is especially unique in its approach to providing users with SHO (SII, Ha, OIII) image capability. Typically capturing an image like this entails using three filters, one dedicated to each of the SHO components, and a monochrome camera. This works incredibly well, but does mean you need to purchase, integrate, and split your available imaging time up between, these three filters. Askar provides a way around this by leveraging the color information that one-shot-color cameras capture in a clever way - by creating one filter that captures OIII and Ha, and one the captures OIII and SII. As the two wavelengths of each filter are relatively far apart, it is possible to separate these out of one-shot-color exposures and construct a full SHO image with information collected from both the Super D1 and D2 filter! Note: This listing is for the Super D1 OIII and Ha 2" filter only. The Super D1 and D2 narrowband filters are available in a bundle for those looking to take advantage of this specialized SHO approach!
More Than Just a Unique SHO Filter!
The 2" Askar Color Magic Super D1 Duo Narrowband Filter has more to offer than just its novel application in SHO imaging - it also integrates narrowband coatings, high transmittance, and Super halo control to make a quality filter for duo-band or SHO imaging.
Narrowband Imaging
The Askar Color Magic Super D1 Duo Narrowband Filter features 6.5nm ± 0.5nm OIII and 8.5nm ± 0.5nm Ha band passes targeting 500.7nm and 656.3nm respectively, with a peak transmittance of 85%. This provides an excellent isolation of the OIII and Ha wavelengths, blocking light pollution and revealing fine detail and contrast in deep sky targets. With this filtering profile, the D1 Color Magic Super D1 Duo Narrowband Filter is best suited for nebulae imaging.
Wide Compatability
This filter is mounted in a 2" threaded filter cell for wide compatibility. The 2" mounted cell design is one of the most common for imaging filters as it can provide up to full-frame sensor coverage, and as a result this filter can be integrated in a large array of filter drawers, filter wheels, and threaded filter cells that are on the market today!
Physical Properties
The Askar Color Magic Super D1 Duo Narrowband Filter features a 60/40 surface finish, with the filter coming in at a thickness of 1.85 +/- 0.05mm. This filter is designed for a parallelism value of 30", and has a listed barrier property of ≥OD5 @ 200-1100nm.
Astronomy Hub: Your one-stop-shop for Astrophotography Knowledge!
Our Gear Experts have compiled a wealth of information to help expand your astrophotography knowledge! Below you’ll find links to articles, videos and "how-to" guides. Just one more reason that our Astronomy Hub is a one-stop-shop for all your astronomy and astrophotography needs!
| Tutorial: Combining Narrowband Data in Pixinsight |
| What is a Nebula and Which are the Best Ones? |