Object: M13 "Hercules Globular Cluster " - Author: Samuele Gasparini (www.astrobook.it) - Equipment: Refractor Skywatcher 80Ed with flattener/reducer 0.85X and camera Moravian G2-4000; RGB Baader Filters. - Exposure Times: Sum of 6x5 min for each RGB channels in Bin. 1x1. - Processing with Pixinsight e Ps Cs3. Location: "Torre Doganiera Farm" Pievescola (Tuscany-Italy)