Pedro Luis Cuadrado
Canon EOS50D, Lens Canon EF II 50mm f/1.8, at f/3.5, automatic guidance with a Skywatcher EQ6 Pro Synscan v.3.25.
Cassiopeia constellation. 20 pictures of 300s at ISO1600, in total 1h40 min taken at +14,5ÂºC of ambient temperature. Plus 12 darks of 300s at ISO1600 and +14.0ÂºC, and 20 bias of1/8000s at ISO1600 and +11.0ÂºC