Messier M20 - NGC6514 - Trifid Nebula - 11/5/2013 (Processed cropped stack)

Image captured at Perth Observatory.

Tracking errors, the source of which I have yet to find, and coma evident. ST4 cable issue or OAG optical setup issue?

DeepSkyStacker 3.3.2 Stacked 85% of 6 Images ISO 800 600 Sec, 39 DARK @ 120 Sec, 75 BIAS, 0 FLATS, Post-processed with Adobe Photoshop CS5

Telescope - Bintel BT200 f/4.0 Newtonian (borrowed from Stephen Boyd) with Televue 2X 2" PowerMate, no filters, Canon 40D DSLR field 32' x 48', Ambient 9C. EQMOD EQASCOM with Ascom 6 for mount control. Backyard EOS 2.09 for Image acquisition. Mount - Skywatcher NEQ6 Pro. Guidescope - Teleskop Service OAG9 Off Axis Guider with Starlight Xpress Superstar (mono) CCD guide camera and Stark Labs PHD auto guiding software.

Messier M20 - NGC6514 - Trifid Nebula - 11/5/2013 (Processed cropped stack)

Image captured at Perth Observatory.

Tracking errors, the source of which I have yet to find, and coma evident. ST4 cable issue or OAG optical setup issue?

DeepSkyStacker 3.3.2 Stacked 85% of 6 Images ISO 800 600 Sec, 39 DARK @ 120 Sec, 75 BIAS, 0 FLATS, Post-processed with Adobe Photoshop CS5

Telescope - Bintel BT200 f/4.0 Newtonian (borrowed from Stephen Boyd) with Televue 2X 2" PowerMate, no filters, Canon 40D DSLR field 32' x 48', Ambient 9C. EQMOD EQASCOM with Ascom 6 for mount control. Backyard EOS 2.09 for Image acquisition. Mount - Skywatcher NEQ6 Pro. Guidescope - Teleskop Service OAG9 Off Axis Guider with Starlight Xpress Superstar (mono) CCD guide camera and Stark Labs PHD auto guiding software.