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Originally Posted by ausastronomer
Mark/Anthony
I am a little confused here  , If the mirror is distorted by the cooling effect, is not its "out of figure" state the same for visual and photographic purposes ? Or are there other factors involved here as well ?
CS-John B |
John
Yes, they are one and the same . I was simply warning that the visual views may be quite poor during the forced Peltier cooling phase ( more so than a natural cooldown). I new that Anthony would no doubt be busy imaging once the system was at optimal temperature, but looks like he anticipates a few windows of opportunity for visual observation.
Mark