Caldwell 94 - NGC4755 - Jewel Box Cluster near Becrux - 23/2/2014 (Processed stack)

First night re-acquainting myself with the 8" PowerNewt I had previously borrowed from Jean-Marie Locci, but that I recently purchase from him.

Noticeable Coma in outer edges but concentrated on one side - non-squareness of imaging plane perhaps?

Noticeable Vignetting without Flats

DeepSkyStacker 3.3.3b51 Stacked 85% of 16 Images ISO 800 30 Sec, 32 DARK @ 120 Sec, 32 BIAS, 0 FLATS, Post-processed with Adobe Photoshop CC

Telescope - PowerNewt 200mm f/4 with PowerNewt(ASA) f/2.84 Reducer/Coma Corrector, No LPS filter, Baader BCF modified Canon 70D DSLR field 90' x 134' , Ambient 25C. EQMOD EQASCOM with Ascom 6 for mount control. Backyard EOS Pro 3.0.3 for Image acquisition. Mount - Skywatcher NEQ6 Pro. Guidescope - Orion ShortTube 80 with Starlight Xpress SuperStar (Mono) CCD Auto Guider and Stark Labs PHD auto guiding software.

NGCNGC4755 C94 Jewel Box ClusterOpen ClusterCaldwellC94 Jewel Box ClusterStarBecrux Beta Crucis

From 2014 First AP modified camera