Re: Best Way To Determine Periodic Error?
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Hi Sonny, If using PHD2, go under the Brain icon, and select either 2x2 or 3x3 median noise reduction. That will eliminate bad single pixels.?? However I don't think it's that.... I think the rotated image is due the mount being very badly off polar alignment.? For long duration deep sky imaging, the polar alignment has to first be close by polar scope, then drift aligned. PHD2 has a good tool for that.? Otherwise you get these rotated images like you show. Are you using a polar scope up the RA tube?? If so beware: polar scopes have a moveable glass "reticule" that must be carefully centered as you rotate the RA axis. You can easily get the center + symbol off the optical center, or crack the glass reticule by overtightening the tiny setscrews.? I think the Orion Atlas manual you can download explains how to center the reticule... More later...going to sleep now at 2:30 am... Best, Michael On Fri, Jul 3, 2020, 1:40 AM Sonny Edmonds <sonnyedmonds@...> wrote: Michael, |
Michael Herman