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Brian Peterson | all galleries >> Galleries >> Hyperion collimation and tests > Defocused star again
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Nov 17, 2010

Defocused star again

2nd time with scope; the primary scope fans had run at 100% for
approximately 40 minutes. Yet there still seem to be serious
thermal currents distorting the image. Also, this image seems
obviously more concentric than the previous image, even though I had not
yet done any collimation adjustments on the secondary mirror.


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