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Bill,
I see now that I was quite unclear about what I am attempting to do!
The polar axis of my mount needs to be raised 80 arcsec to obtain optimal polar alignment according to T-Point. Moving the axis such a small amount can be a hit or miss proposition if one depends entirely on the MX adjustment control, so I am attempting to confirm such a move photographically. Using the slew control of TheSkyX I first lowered the scope to point 80 arcsec below a star centered in a photograph. Then I raised the mount physically by 1.2 tics on the MX adjuster. Then taking a second photograph I wanted to confirm that the physical adjustment of the mount was actually 80 arcsec up. I had hoped to confirm the move by comparing the first photograph to the second photograph. But in trying to do this I have become stuck. In other words if I had successfully raised the mount by 80 arcsec the star would be recentered. As I mentioned, 6 months or so ago I did this easily but 2 nights ago I got bogged down in actually trying to compare the photos. What I'm asking is if there are any experienced users of TSX out there that might propose a clean way to do this seemingly easy task. If the photo viewer in TSX actually had a cross hair defining the center of a photo this task would be fairly simple, but if there is one I have not found it. I have figured out a fairly task intensive way to do it in photoshop using a grid pattern where the pattern shows divisions of 1 arcmin. By using this method it should be possible to just move the axis up/down or in azi and read the change by comparing how far the star moved from centered and it wouldn't be necessary to slew the mount in the opposite direction first. Any ideas are welcome. I'm sure there is something obvious I'm missing!!!
Peter
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