Re: [APML] Revisit of M16/M17

[Jerry Lodriguss <jerry@astropix.com>]

>  I revisited and just
>tried my best to match the view on the slide.  I came much closer this
>time.  That is another think I like about positives, one can sit with
>the positive on a light box under a loop and match the enhancement to
>what the eye is seeing.  Oh well, here is the redo.

Hi Jeff,

Excellent results.  It looks really good to me.

If you are going to try to match the view of the original slide make sure 
you use a 5,000k light box.  This probably wouldn't work too good if you 
shot the original under any light pollution though. <G>  I prefer to think 
of the original film image as my "raw" data. I can't think of many examples 
where you can't improve on the raw data in one way or another when you 
correct and enhance it in Photoshop. What I try to do is make sure I just 
preserve all of the original data from the film in the scan. If you have a 
transparency original, matching the eyeball view on a light box is a good 
way to do this.



>  One thing I haven't seen any scanner do well for
>our astrophotographs is give us a zoomed in preview to check focus.
>Maybe I just don't know how to do this with the Nikon and it is a
>feature.  If so, please share the technique.


I don't have the Nikon scanner hooked up right now, but I'm pretty sure all 
you have to do is draw a crop box, and hit the plus magnifier icon.   I 
seem to remember that you might have to run the preview again to get a high 
res display of the crop to show up in the preview window. Then you have to 
remove the crop and run preview again to get the 1:1 sized preview 
back.  It's definitely worth using the magnification function when you are 
setting the "sky background aim point". I've started using that term 
instead of "black point" because you don't really want it black at 0,0,0.

Jerry







The book "Photoshop for Astrophotographers" is now finished!

  Go to: http://www.astropix.com/PFA/PFA.HTM










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