Re: [APML] More SS4000 scanning questions

["Carlos Milovic F." <cmilovic@yahoo.es>]

> sRGB is the usual defalt then?

It is the standard for web or displaying purposes.
Rougthly, sRGB is the profile for a standard monitor.
If you open an image with a web broser (typically a
jpeg one) it will be assumed that it has a sRGB
profile embedded. So, if you have disabled the color
management, or just want to use the image for
displaying purposes, don't use a profile embedded, or
use sRGB (you have to calibrate your monitor...)
> Don't have PixInsight so I'll take your word on
> that.

;-)

It's free... give it a try.
http://pleiades-astrophoto.com


> Most of what you descibe is a little over my head,
> but even so, I have
> noticed the data gets whacked because I can tend to
> really stretch
> things out just working with levels, curves and the
> other basic image
> adjustments.

Well, this is just a matter of practice... and my
recomendation is to use the better image processing
software you can. For example, while Photoshop is a
great software for common images, it is not well
suited for astrophotography, specially raw ones
(scanned or from a CCD). One important feature of
Photoshop that many are not aware of is that it only
works with 15bits instead of 16, so you might be
loosing a lot of valuable data. Do all your first
adjustements (most of them the most aggressive ones)
in a software that can handle a greater bit accuracy.
There are many of them, specially made for AP, and
some of them are freeware.

> What you and Jerry have said has convinced me to
> start scanning at the
> full resolution. I just got back some more real nice
> M33 shots that
> look great and I want to pull everything I can out
> of them.

What Jerry said about doing as much as you can in the
prescan, while you get more experience, is a great
suggestion. Anyway, when you get familiar with levels
(histograms) and curves, go back to raw scans. 



=====
Regards,

Carlos Milovic F.
-------------------------
Astro & Photo - CMF
http://www.astrophoto.vze.com
-------------------------
Visita "AstroFoto", el foro de astrofotografía en español
http://espanol.groups.yahoo.com/group/astrofoto


	
	
		
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