It looks more like a tracking error that collimation. The softness could be because the focus is off a little or because the tracking is too aggressive and overshoots and corrects frequently. Since you ate stacking images I would suggest shorter exposures to see what that looks like. ------------------------------ On Tue, May 20, 2014 3:17 PM MDT gazebo4sale@comcast.net wrote:
Don, Thanks for looking. I have a collimation eyepiece for this refractor and it does look good. I will have to check it out with a star ASAP. Here is a 300 second sub from my M20 image that I have enlarged to show the elongation. Do you think this is tracking. The software I use to Stack, (images plus) handles eccentricity quite nicely but the focus becomes a bit soft. Your input will be greatly appreciated. See: http://home.comcast.net/~galico/M20Track.jpg
Steve
----- Original Message -----
From: "Don J. Colton" <djcolton@piol.com> To: "Utah Astronomy" <utah-astronomy@mailman.xmission.com> Sent: Tuesday, May 20, 2014 2:49:16 PM Subject: Re: [Utah-astronomy] M64 Image
That looks like a tracking error not collimation.
-----Original Message----- From: utah-astronomy-bounces@mailman.xmission.com [mailto:utah-astronomy-bounces@mailman.xmission.com] On Behalf Of gazebo4sale@comcast.net Sent: Tuesday, May 20, 2014 1:51 PM To: Utah Astronomy Subject: [Utah-astronomy] M64 Image
Hi, I captured this image of M64 during my trip to Capital Reef 3 weeks ago. I have to get to the bottom of my collimation problem, but the image came out interesting.
see: http://home.comcast.net/~galico/M64.jpg
Thanks Steve Gallenson
25X300" Light Subs
Dark,Flats, Bias calibrated.
Staked in Images Plus
Backyard EOS camera control
Hutech Modified Canon T3i
Takahahshi FSQ 106 N for imaging
Takahahsi EM 200 Temma 2 mount
Guided with Starlite Express Loadstar on 500 mm Nikon Lens.
Processed with IP and CS5 using Scott's LRGB techniques. ----- Original Message -----
_______________________________________________ Utah-Astronomy mailing list http://mailman.xmission.com/cgi-bin/mailman/listinfo/utah-astronomy
Send messages to the list to Utah-Astronomy@mailman.xmission.com
The Utah-Astronomy mailing list is not affiliated with any astronomy club.
To unsubscribe go to: http://mailman.xmission.com/cgi-bin/mailman/listinfo/utah-astronomy Then enter your email address in the space provided and click on "Unsubscribe or edit options".
_______________________________________________ Utah-Astronomy mailing list http://mailman.xmission.com/cgi-bin/mailman/listinfo/utah-astronomy
Send messages to the list to Utah-Astronomy@mailman.xmission.com
The Utah-Astronomy mailing list is not affiliated with any astronomy club.
To unsubscribe go to: http://mailman.xmission.com/cgi-bin/mailman/listinfo/utah-astronomy Then enter your email address in the space provided and click on "Unsubscribe or edit options".
_______________________________________________ Utah-Astronomy mailing list http://mailman.xmission.com/cgi-bin/mailman/listinfo/utah-astronomy
Send messages to the list to Utah-Astronomy@mailman.xmission.com
The Utah-Astronomy mailing list is not affiliated with any astronomy club.
To unsubscribe go to: http://mailman.xmission.com/cgi-bin/mailman/listinfo/utah-astronomy Then enter your email address in the space provided and click on "Unsubscribe or edit options".