IC 5146 Cocoon Nebula in Cygnus, with TMB 92mm apo refractor and Borg 0.85x reducer/flattener for f/4.8 and Canon 20Da camera at ISO400 for 4 x 15 minute exposures.
Stack of 8 exposures with the Quattro median combined and with T-Shirt sky flats applied in Photoshop.
