Supernova 2011by in NGC3972 Posted on 02/05/2011 by Jaap Despite strong winds and severe light pollution (shot from the city center of Almere), the supernova is clearly visible. Canon 40D and William Optics FLT98 with 0.8x reducer (f=495mm). Stack of 10×1 min at ISO1600. 2011-05-01. 21.54 UT.