Thanks for the comments, folks.
Last night was a very keen demonstration of the impact of variable seeing.
Originally Posted by [1ponders]
Nice one Matt.
You're not shooting over someones house or over a large paved area are you? Even at 2 in the morning, if I shoot over the next door concrete paved tennis courts I'll still get jumpy images. Mind you that's been quite a while ago now
Paul... I image from a suburban Canberra backyard. There are houses in every direction... and it's ConcreteVille as far as the eye can see
I've just never seen the seeing come and go quite so rapidly as it did last night. It was like someone was flicking an on-off switch, it was that rapid.
I normally observe a more gradual breakdown, with a likewise more gradual recovery. However, the transitions last night were brutal.
It was quite something to watch on the lappy screen.
I've only just woken up from crawling into bed at dawn this morning and will now spend the next few hours chugging through the other AVIs to see whether there's anything better in the bunch.