Re: [APML] Flat Fields for vignetting

["Jim Ives" <flyboy9990@earthlink.net>]

I gues I scan mine a little too light. There usually a little lighter than
that.
    I use the Polaroid SS400 and the deepest it goes is 12bit color depth.
Then in Photoshop it thinks it's 16 bit depth even though it's not I guess.
    I think I'll try using the raw scan setting though and see what
happens....
Jim
----- Original Message -----
From: "Matt BenDaniel" <matt@starmatt.com>
To: <astro-photo@seds.org>
Sent: Friday, November 15, 2002 3:44 PM
Subject: Re: [APML] Flat Fields for vignetting


> At 03:13 PM 11/15/2002 -0500, Jim Ives wrote:
> >I scan my images pretty light. Mine are always exposed byond the toe in
the
> >corners.
>
> Jim,
>
> That's good.
>
> >Maybe I should try scanning them a little darker.
>
> Not necessarily. If you're using most of the dynamic range (without
clipping), then it's fine to have a light scan, like the top picture here
(which is the first astro article I wrote):
> http://starmatt.com/articles/postproc.html
>
> My advice: use the scanner's greatest bit depth (e.g. 16-bits per channel)
and keep it raw until getting into Photoshop.
> --
> Matt BenDaniel
> matt@starmatt.com
> http://starmatt.com
>
>
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