IC 443 Supernova remnant in Gemini Stack of four 15-minute exposures at f/6 with 5-inch Astro-Physics apo refractor with 6x7 field flattener for cleaner edge performance. ISO 400 and about -5°C ambient temperature. Each image averaged stacked. Dark frame subtracted for each frame in camera with Canon LENR.
IC 443 supernova remnant in Gemini, with 92mm TMB apo refractor, with Borg 0.85x reducer/flattener for f/4.8 and Canon 20Da camera at ISO400 for 4 x 15 exposures. Large faint nebulosity at left is Sh2-249.
