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Old 06-08-2014, 04:23 PM
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Shiraz (Ray)
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Shiraz is offline
Join Date: Apr 2010
Location: ardrossan south australia
Posts: 4,890
Originally Posted by multiweb View Post
Stars are noticeably rounder with AO on. What's the guide rate you managed you say? 10Hz? Must have been a very bright guide star...
yep, it was bright. The lodestar exposure was 0.1s, but the actual update rate was less than 10Hz. I was doing testing, so chose a bright guide star by just scanning around to find one with a high SNR and then imaged whatever happened to be in the field at the time. I imagine that finding a bright enough guidestar would be a major practical issue.

The unguided EQ8 was producing nice round stars, so the AO could not improve on them. Have you ever found that the stars can be rounder, but a bit bigger, with AO on?
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