Herm <firstname.lastname@example.org> writes:
> I use vuescan, in 48bit mode, and export mostly raw scans to
> photoshop.. there I do a proper levels adjustment.. You will not get
> good results with any auto software on astrophotos.
True. It's nice to have a hobby that will likely keep me busy for at
least _some_ time... :-)
> for slides I do not use any color correction, for negatives I set
> color correction in Vuescan to auto white balance, black point set
> at 0% and white point set at 0.01%
The 'White Point' seems to be important, Ed wrote me a similar mail,
he suggested 0.001% (One quick test yesterday was far better than the
grainy, partly over-exposed scans I did before). It was probably the
only setting I had not yet tried.
As Lynn pointed out, I did not really describe my problem, so here it
comes: Scans from astronomical pictures on Kodak Royal 1000 or Kodak
Elite Chrome 200 turn out to be heavily over-exposed, even when I set
white balance to 'neutral' or 'none' and fiddle with the exposure
time. All this is using a ScanWit 2720S and VueScan7.1.3 (I just
downloaded the 7.1.7).
> here is a link to proper astrophotography levels adjustments:
Hm... nice, thank you!
Jan Exner · email@example.com · 0x9E0D3E98 · http://www.jan-exner.de/
'Von mir aus können sie ihre Raumschiffe mit Klafter und Ellen messen'
(Peter Hellinger in de.sci.astronomie)