This section is only for the posting of actual tutorials, either single post or multiple, to ask questions or comment on a tutorial, please use the TUTORIAL DISCUSSIONS section where you will find a topic titled for each topic posted here, it just helps stop the topics becoming convoluted and lets the tutorials flow properly. If you post a tutorial, please also post a topic into TUTORIAL DISCUSSIONS with the same title.
A classic example is M42 which has a huge dynamic range, it is hard to controll the core and process the feint stuff at the same time. What we need is 2 different images and then blend them together to make a composite image. The usual way to do this is to make a set of exposures to highlight the outer bits, so say you capture the subs in 10 min lengths, and then go on to take a set of 3 min subs for the core.
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