Re: Are 256 shades of grey enough dynamic range for silver? or platnum?

From: Jeff Dilcher ^lt;[email protected]>
Date: 09/29/04-02:10:12 PM Z
Message-id: <20040929201012.GD30370@hiddenworld.net>

I may be missing something, but, if your 256 shades fall between
full black, and full white, I would say you have a pretty good
dynamic range.

I don't think the eye can differentiate the tonal differences betwen
any two of those consecutive tones.

If you are manipulating in an image editing program, however, only
a slight adjustment can make the seemingly smooth tone of a 256 step
image look really bad.

On Wed, Sep 29, 2004 at 02:21:02PM -0400, Ender100@aol.com wrote:
> Mark,
>
> here is a book that really covers this issue of tones in an image very well???
> also the issue of sharpness of image:
>
> http://ctein.com/booksmpl.htm
>
> Best Wishes,
> Mark Nelson
> Purchase the book @
> www.PrecisionDigitalNegatives.com
> Credit Card & Paypal now accepted
> www.MarkINelsonPhoto.com
>
>
>
> In a message dated 9/29/04 1:42:46 AM, gum-printer@qwest.net writes:
>
>
> > Hi folks,
> >
> > I have been lurking for years on the list. perhaps since 1993 or 1994.
> > Most of the time whenI read about people asking questions someone
> > very qualified has already answered.
> >
> > I have been making Gum Prints since 1989 and have done
> > Silver Cyanotype and Collotype and have made paper negatives.
> >
> > Since 1992 I have been doing digital photo manipulation.
> >
> > Any way I have been making enlarged negatives on APHS film with some
> > success..
> > About a year ago I bought a?? 16 K Film recorder. It makes beautiful
> > 4 x 5 negatives or positives.
> >
> > It seems that they look correct but I can't help but wonder how
> > big of a dynamic range that 256 shades of grey really is.
> >
> > I know that it depends somewhat on what the medium one chooses
> > to use to interpet the negative. I am thinking of?? silver as a kind of
> > starting point.
> >
> > Does anyone know of any objective way to evaluate this?
> >
> > Thanks,
> >
> > Mark A. Morrill
> >
>
>
>
>
>
>
Received on Wed Sep 29 14:10:22 2004

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