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Thanks for your comments and advice Cometcatcher and Retrograde. I actually went out again last night and took some more subs of Eta Carina and produced the image below. I also did a cropped version around the eta Carin centre as well and attcahed this below. This time I had the light pollution filter on and used the 600D modded camera. I took the following:
80 x 20 sec Lights at ISO 3200
20 darks
20 bias
There is more detail in this photo than the last but the noise is also more evident. But I am still quite happy with this. I'll also see if I can stretch the last photo a little further too.
Thanks,
Tom
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