Comet Hartley and Perseus Double Cluster

Since I wanted to take picture at 800mm, there of course was no practical way to fit both the comet and clusters in a single photo. So, I took a huge risk and made my first mosaic. Two exposure sets with both at 25X100". SN-8 OTA at f4, CanonXT, Atlas EQ-G, DeepSkyStacker, Photoshop levels, curves and synthetic flats, guided with Orion SSAG and piggybacked SVR70ED.

Done