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and the filter is optimized for telescopes with focal lengths from f/4 to f/15
60°Field of View
the Wanderer Rotator Pro preserves precious backfocus while maintaining exceptional rigidity
built-in GPS
The radio that saves lives
ZWO 31mm H-alpha 7nm Narrowband Filter - UNMOUNTED - Mark II sd_preorder and the filter is optimizedNarrowband 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
