Quote:
|
Originally Posted by Robert_T
Hi All, left scope out after a quick session with Mars yesterday evening and was lured from bed around 3.45am by clear skies. Managed to get, caps of, powered up, focus on Jupiter, slipped in the neximage, centred the image, touched up the focus... AND watched as it suddenly faded from view - looked up and the sky was wall to wall cloud GRRRR  . Hung around hopefully and finally took 90 secs worth (900 frames) of avi during a thinner patch of fast moving cloud - lost a couple of hundred through fading alone.
Wasn't even going to bother processing, but glad I did. Seeing must have been quite good as even under these conditions the detail I got was not bad at all - here they are, same frames just different degrees of jiggery pokery with Gamma adjustment, curves and soft sharpen. Both were LR deconvolution processed in Astra Image.
cheers, |
Robert, I have seen that cloud causes the ambient temp to rise by a couple of degrees, as the clouds prevent the ground from cooling and reflect the heat back down again.
Normally the mirror will be lagging a couple of degrees behind the ambient temp as it falls, and so the sudden appearance of cloud can bring the mirror and ambient temps together, meaning your mirror suddenly performs better as the boundary layer and other thermal problems just "go away" under these conditions.
regards, Bird
- makes sense.
