m42: Great Nebula in Orion Published December 13, 2014 at 1500 × 932 in Nebulae Great Nebula in Orion Image & Equipment Details: Date: 11/23/13 Calibrated with bias, flat, and dark frames Processed in PhotoShop Imaging Scope: Orion ED80 Apochromatic Doublet Imaging Camera: Canon 1100D Annotated Image: