ZWO 31mm CCD Narrowband 7nm Ha SII OIII Filter Set 93529 203mm Parabolic Primary Mirror (Low-Expansion

203mm Parabolic Primary Mirror (Low-Expansion Borosilicate Glass)

Magnifications (with eyepieces supplied): x20 & x50

The internal structure of the body is optimized with the strain wave gear reducer and synchronous belt

collimation rings are provided

ZWO 31mm CCD Narrowband 7nm Ha SII OIII Filter Set 93529 203mm Parabolic Primary Mirror (Low-ExpansionZWO 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