Hello... This photo of the Great Nebula in Orion's sword (Theta Orionis) was obtained with my 300mm f/8 William Optics refractor riding piggy-back on my 12-inch Meade LX200. It was my usual formula of 12, five-minute subexposures aligned and stacked. Camera control, and some processing was done using Images Plus. By the way, the effective focal length of the system was 480mm thanks to the 1.6 crop factor of my 500D.