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Old 08-07-2012, 09:47 AM
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rcheshire (Rowland)
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Join Date: Apr 2010
Location: Geelong
Posts: 2,617
Thanks guys. It surprised me too. Must get it on a mount and stop it down a bit.

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But why the distortion in the corners ? Lots of coma / astigmatism in the corners. Is this the objective lens ?
Stopping down to f/2.8 and raising to 40 secs exposure (and tracking) makes better star images in the corners.
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Wish I had my gear with me. This was taken with the camera resting on a baseball cap for stability and perched on the windscreen - bonnet of the car
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Ignoring the fact that the lens is not designed for this type of work
Yes tracking fstop etc etc would have been great, but not available at the time - missed opportunity.
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