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That puts you exactly where I am, discovering gimp by trial and error (more errors than trial). I have only had 4 imaging sessions so far and the last one was a total disaster. Collected around 1/2 hours of data on the carina nebula only to find my focus was way off. I dont have live view - its a 300D -on the plus side it has had the filter removed so it has great sensitivity to Ha. My learning from the night was focus on a BRIGHT star and lock it off before hunting down the target. Anyways, you look like you are doing fine and having fun - thats the main thing - if you learn a bit on the way its a bonus.
Cheers,
Bruce.
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