ZWO 31mm H-alpha, SII, OIII 7nm Narrowband Filter Set - UNMOUNTED - Mark II Wide Field Imaging There is an ever growing

There is an ever growing demand for filters suitable for extremly fast optical systems like Celestron's RASA and the Epsilon Astrographs made by Takahashi

unwanted light at other wavelengths is reduced

The ZWO ASIAIR Plus 256GB is one of the most important accessories in modern amateur astrophotography

Our Astronomik MaxFR filters are perfect for deep-sky astrophotography with fast systems

Hard-coated

ZWO 31mm H-alpha, SII, OIII 7nm Narrowband Filter Set - UNMOUNTED - Mark II Wide Field Imaging There is an ever growingNarrowband filters are used to create high contrast deep sky images of certain objects, mainly emission and diffuse nebulae (i. e. Veil Nebula, M42 Orion Nebula, North America Nebula, Horsehead Nebula) or planetary nebulae (i. e. M27 Dumbbell nebula, M57 Ring Nebula, Helix Nebula), just to mention few of well known nebulosities. Narroband filter sets are sometimes used instead of LRGB filter sets and sometimes in combination with them However, if you