Globular cluster M13 in Hercules

Another subject from the run of clear nights in April.

12 x 3-minute manually-guided exposures at ISO 3200, f/6.25. Astro-modified EOS 600D & Sky-Watcher ED 80mm refractor telescope.

Frames registered and stacked in DeepSkyStacker software; curves adjusted in Canon Photo Professional; noise reduction in CyberLink PhotoDirector.

Done