Yep, I understand what you mean. You need to have differing exposures for the HDR process. Thus, CCD work does not lend itself to HDR work very well. Sure you could capture maybe 5min, 10min and 15min exposures, but this isn't the typical methodology used for long exposure CCD work. As CCD's response to light is linear, the DSO imaging trend is longer and longer subs. 15mins today, 30mins tomorrow. None the less, its good to try these processing tasks out to see what is capable.
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