Re: ProPhotoCD and enlarged negatives

Dwight Shackelford (tshack@silver-bayou.com)
Sat, 23 May 1998 11:03:51 -0700

I may have answered my own question about the ProPhotoCD resolution, or I
may be further confused. Reading another source it looks like the
resolution is 4096x6144dpi. However, final file output is 72mb, which is
still 4096 x 6144 x 3 colors.

I'm confused.

Dwight Shackelford wrote:

> Has anyone used the highest resolution ProPhotoCD scan (4096x6144) for
> retouching and subsequent production of either a reproduction negative
> or an enlarged negative.
>
> Supposedly, according to the literature of my service bureau, the
> ProPhotoCD scan is "sufficient for prepress color separations, image
> retouching and digital archiving". And they are cheaper. I've already
> read David Fokos' article on making digital negatives for B&W fine-art
> photographs, which has prompted my questions. Otherwise I would just go
> with the PhotoCD.
>
> The thing is, it seems like regardless of what format my original film
> (35, 120,4x5), the final size is 4096x6144. For a 4x5 negative, that is
> 1024 dpi, not 4096.
>
> Has anyone used this, and am I understanding the literature correctly?
>
> Firstly I am wanting to clean up some scratches on some negatives, and
> to cleanup some fingerprints on some infrared negatives. I would want
> an end result that would be comparable to the original, except with
> defects corrected (i.e. usable for enlarged silver prints).
>
> After that I would look at what I need for alt-photo-processes regarding
> enlarged negatives.
>
> Dwight "The Question Man" Shackelford