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Old 18-03-2013, 07:42 AM
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RickS (Rick)
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Join Date: Apr 2010
Location: Brisbane
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Originally Posted by Shiraz View Post
hi Rick. What a neat idea. so by non-linear blending of short exposure data for the bright bits you get better star colour yet retain full sub lengths - yep, that works. The only downside I can think of is that the short exposure stars would be smaller than the saturated regions they replace, but that would not be impossible to fix.

Of course, there are some secondary reasons why it is useful to reduce sub exposures below the SNR optimum - easier tracking, fewer satellites, wind problems reduced etc, but there is still a strong case for minimising imaging time with full length subs.

Anyway, many thanks for introducing such a great idea. Do you think commerical HDR software would do the job?. Ray
Thanks, Ray. I have done this with the HDRComposition process in PixInsight successfully. I haven't tried any of the normal photographic HDR programs to see if they would work. I prefer to process in FITS format right up until I export a final image.

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