RE: OT, Historical Photo Question

I believe it was "ortho" chromatic, meaning it was not red sensitive and
over sensitive to the blue/green end of the spectrum. Therefore over
exposing the sky portion of landscape images. Modern films are "pan"
chromatic and sensitive to both.

Scott B. Weber
Associate Professor of Photography
Department of Fine Arts
Barry University
11300 NE 2nd Avenue
Miami Shores, Florida 33161
(305) 899 4922
 

-----Original Message-----
From: Nick Zentena [mailto:zentena@sympatico.ca]
Sent: Monday, October 10, 2005 1:23 PM
To: alt-photo-process-l@sask.usask.ca
Subject: Re: OT, Historical Photo Question

On Monday 10 October 2005 13:15, Dan Burkholder wrote:
> Sorry to clutter the list with this but I don't know of a more
> knowledgeable group to ask. A friend sent the following inquiry so any
> info is much appreciated and will be forwarded to him with the
>
> appropriate credit line:
> > Some "old time" black and white photographers use to take two
> > photographs, one for foreground and one for sky and "meld" them some
> > how into one plate (back in the days of glass plates). Just at a talk
> > with Robert Glenn Ketchum who was talking about it. Do you know what
> > photographers there were, the name of the process and where I might
> > find out more info on it?
>
> Thanks for helping!

        It was because the film was only green sensitive. Before Ortho film.
I
think-)

        Nick
           
                       
                
The information transmitted is intended only for the person or entity to which it is addressed and may contain confidential, and/or privileged material. No confidentiality or privilege is waived or lost by any errant transmission. If you receive this message in error, please immediately delete it and all copies of it from your system and notify the sender. E-mail transmission cannot be guaranteed to be secure or error-free as information could be intercepted, corrupted, lost, destroyed, arrive late or incomplete, or contain viruses.
Barry University - Miami Shores, FL (http://www.barry.edu)
Received on Mon Oct 10 11:39:54 2005