Nebulae - Barry Wilson
Sh2-261 Lower's Nebula in CFHT

Sh2-261 Lower's Nebula in CFHT

As the previous image, except this time the narrowband channels SII, Ha and OIII are mapped with Ha to red, OIII to Green and SII to Blue to produce a CFHT Pallete, named after the Canada France Hawaii telescope which utilised the mapping technique as an alternative to the better known Hubble Pallete (SII to Red, Ha to Green and OIII to Blue).

Lowers'NebulaHaHOS