Thanks Adam and Martin,
I tried a heap of all different exposures with the short ones to capture the core without blowing it out.
Out of all the exposure I think I got the best signal to noise was the 2 minute subs. With the 5 mins subs I should wait until the weather cools down a bit.
Its been stretched quite a bit until the banding was coming out so with my old 450D i'm pushing to get 5 min subs without all the noise and artifacts that come with it.
Cheers
Andy
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