ZWO 31mm H-alpha, SII, OIII 7nm Narrowband Filter Set - UNMOUNTED - Mark II Wide Field Imaging well-known MFR Coating technique gives

well-known MFR Coating technique gives you the best out-of-band blocking possible across the entire range of wavelengths from UV up to IR

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

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

the T131S allows up to 49 groups to operate simultaneously in one area without cross-interference

Alex Nicholas

ZWO 31mm H-alpha, SII, OIII 7nm Narrowband Filter Set - UNMOUNTED - Mark II Wide Field Imaging well-known MFR Coating technique givesNarrowband 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