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Thanks David.
Yep, Tony thats right I do lose some inner detail when processing the images to get the fainter stuff. Also, when I extract the raws using Photoshop, I can extract them as "camera default" which is what I do normally. For the mask, I drop the exposure one or 2 stops with the Photoshop raw plugin, then extract it, it comes out much darker. However for really bright objects like M42 or the inner parts of the Lagoon, a separate, shorter exposure/s is the only way to go as if the pixels of the camera sensor are flooded, then no amount of extraction will recover the detail. The trapezium area of M42 floods in just a few mins, so I must use a separate exposure of no more than a minute or so to still see the inner detail.
Scott
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