The large open cluster NGC 752 in Andromeda, taken Sept. 14, 2007 for stack of 4 x 3 minute exposures with 135mm L-series lens at f/2.8 and Canon 20Da camera at ISO 800. Simulates binocular field.
NGC 752, the large binocular and naked eye open cluster in Andromeda, taken through the TMB 92mm apo refractor and 0.85x Reducer/Flattener for a 5° x 3° field, like a low power telescope. This is a stack of 5 x 6 minute exposures at ISO 800 with the Canon 6D. Some haze added star glows and background sky fog.
