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.
The supernova remnant IC 443 in Gemini near the stars Mu (left) and Eta (right) Geminorum. Slight haze passing thru on some exposures added the star glows. This is a stack of 10 x 6 minute exposures with the 92mm TMB apo refractor at f/4.4 with the Borg 0.85x field flattener/reducer and the filter-modified Canon 5D MkII at ISO 800. Star spikes added in Photoshop with Astronomy Tools actions.
