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Originally Posted by atalas
Tony I thought that tempreture and focuse had to be the same as when you took your images ? are you making Masters Flats for every image you take ?
Yes $650.00 for a gadget is heavy alright , It would wan't to do all the work for you at that price .
Louie
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Focus has to be close. I can judge that on my scope by the focus tube position. Temperature would only be important if it greatly mucked up your focus (unlikely).
I have several master flats for different camera orientations that I use regularly. I also makes flats for my piggy backs and they are cataloged by f ratio and focal length.
Some people take flats for each new image as dust motes can change. I haven't had dust motes yet, so that hasn't been a problem.
cheers