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Old 04-12-2015, 08:59 AM
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JohnH
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JohnH is offline
 
Join Date: Feb 2005
Location: NSW
Posts: 1,226
What it looks like now...

OK so we had a clear, calm night so I could test a bit more. The results were a bit disappointing - I have had rounder stars...M41 was the test field and short exposures looked very nice but 5 mins starts to show up anomalies. Image scale is 0.75" per pixel. I definitely need to tweak something here - even though CCDInspector seems to be saying I am close...2.4" collimation error and 4% tilt. Not sure if the latter is regarded as significant or not given the field curvature on these scopes.....and I am not sure I believe those numbers in view of the image. The image is not calibrated - colour converted (ST4000) and just stretched a little.

Perhaps the Tak scope should be on my xmas shopping list....
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