[mynameiscd (Andy)]

Hi all,
Im about to try guiding while I've got these clear nights coming up but before my wife puts a me on the missing persons list just a question.
At the moment im getting pretty good subs at 1 minute, and even 2 minutes but i tried some 3 minute last night and got some rotation.
My question, is 10x3 minute the same data as 30x1 minutes?
Im pretty sure that the 3 minute subs will be better but with my 450d am I pushing the sensor to its limits anyway so even with the guiding im not going to get better images in the long run.
I might get longer subs but the signal to noise will be less because of no cooling etc.
I'm not getting slack but at the moment im not using my laptop for imaging only processing and guiding means a lot deeper learning curve and more to go wrong.
Cheers
Andy