NGC 7293 Helix Nebula
The Helix Nebula is one of the closest of all planetary nebulae and one of the apparently largest planetaries known. At a distance of 450 light years, its apparent size covers an area of 16 arc minutes diameter, more than half of that of the full moon.
Image is obtained through a refractor William Optics FLT98 (98/618 mm), TeleVue field flattener/reducer 0,8x, Lumicon DeepSky filter, SBIG ST8300 CCD camera, guided on QHY5 , 7x10 minutes exposure. July, 2012.