ZWO 31mm CCD Narrowband 7nm Ha SII OIII Filter Set 93529 the controller may be operating

the controller may be operating near its power limit

especially suitable for all reflector type telescopes and true Apochromates

permitting unique spectral characteristics unachievable with any single filter

Magnifications (with eyepieces supplied): x20 & x50

4mm Diameter

ZWO 31mm CCD Narrowband 7nm Ha SII OIII Filter Set 93529 the controller may be operatingZWO 31mm" CCD Narrowband 7nm HA SII OIII Filter Set This ZWO 31mm CCD Narrowband 7nm Ha SII OIII Filter Set is 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 a few of well known nebulosities. Narrowband filter sets are