Colour Magic 2-inch Duo-band C1 (Hα+OIII) Alt-Az Mount the TC-237H CCD will normally

the TC-237H CCD will normally be binned 2x2 for increased sensitivity

carbon fiber or steel tripod

2 RASA optics

High Transmission Rate: In systems with a focal ratio of F2 and above

Petzval Design

Colour Magic 2-inch Duo-band C1 (Hα+OIII) Alt-Az Mount the TC-237H CCD will normallyThe Colour Magic C1 2 inch Duo band filter is designed for advanced deep sky astrophotographers who are shooting emission nebulae, like the Orion Nebula (M42), Lagoon Nebula (M8), or the Ring Nebula (M57). Unlike most filters, which record a wide swath of the visible light spectrum, this filter only records the specific, brightest colors of glowing hydrogen gas (the H or Hydrogen alpha) in your cameras red channel, and oxygen gas (the O III or Oxygen