@pscammp wrote:
Hey all,
I have a general question to anyone really if any one's up for it.So hypothetically, I have a sequence ready for execution tonight of object 'X' and I'm going to take 30 Lights.
How do you go about working out what the best exposure time will be for your Subs ????
So I have one theory although it is an uneducated one, for a given exposure time, Take a 'frame and focus' single image and stick your cursor over the brightest star in the image and make sure it is close to saturation but not saturated ??
At the same time, ensure that if light pollution is present in the image then it is not too bright as to render the subs useless. How would you recognise when light pollution IS too bright meaning you will have to lower your exposure time to compensate.
So what's your recipe for determining the optimum exposure time for your subs using your setup ????
I'm using an F4 Newt and a QHY8L
Regards
Paul
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