Askar 3nm Colour Magic Ultra Ha/OIII E1 Filter - 2"

Askar newly launched ColourMagic Ultra E1 2” Duo-narrowband Filter, is a professional astrophotography tool specifically designed for deep-sky imaging. The Ultra E1 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 E1. And in the end, it becomes a special filter with one bandwidth at 3nm and the other bandwidth outside 3nm.