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raymo did i read that you take your mount in every use?
why dont you buy a bbq cover and leave it outside, get the best pa possible and then rebalance the ota every use?, it would save some headache surely?
then you could spend minimum time tweaking the pa every use
any way at 50mm you could easily get 90s subs and stop the lens down a little
where are the gradients coming from?; light pollution??
pat
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