I love M13. It’s one of my favorite Messier objects.
But, my real interest are in galaxy's. It's weird, I'm almost drawn to these things.
Shot this one about 2 months ago, with the same camera/instrument, but no light filters were used in the optical train.
At 23 millions light years out, this is M-51, Whirlpool Galaxy.
This was a series of 26 images at 80 seconds each on the exposure. I shot this object again last weekend, and hopefully it will process out some better data.