Fig.12 - The famous "Orion Nebula" (also known as Messier 42 & Messier 43) in the constellation Orion on October 23, 2011. A 80 second exposure, a 4 minute exposure and an 8 minute exposure at ISO 400 were combined and processed in Photoshop for this image. Unfortunately, the nebula was still low in the sky and wind slightly impacted the guiding. Equipment: Canon EOS 20Da camera, TeleVue coma corrector, Zambuto 16" f/5 quartz optics in a Dieter Martini dobsonian telescope, dual-axis Tom Osypowski equatorial platform, Lacerta MGEN autoguider, Teleskop-Service off axis system TS-OAG9 EOS.