M57 - The Ring Nebula

Narrowband image - Hubble Palette (SII-Ha-OIII), 12" LX200R scope at 3200 mm focal length

(35 hours total exposure - SII for Red 5x30 min B1 plus 19x30min B2, Ha for Green 16x30 min B1 plus 6x30 min B2, OIII for Blue 12x30 min B1 plus 8x30 min B2; June 2012)