Ammasso Globulare di Ercole - M13

Canon 1100d fullspectrum CLS CCD Tecnosky 70/420 ED; Skywatcher AZEQ5

ISO 1600 - Exp: 2h 16mn with autoguider; Darks & Flats & Bias

DSS4 + PS (Astronomy Tools; Tonalitymasks) * CROP

Siena, 21/04/2018

Done