Re: [Leica] The earliest known photograph in the world was recently

[Adam Stepien <adam_stepien@yahoo.com>]

"Heliography, as Niepce described it in 1829 in his
'Notice sur l'heliographie', may be divided into two
different methods:
- - Copying, by the action of light, existing image
(engravings) wchih had been made transparent by means
of varnish. The light-sensitive intermediary was
bitumen of Judea. This procedure formed the basis of
later techniques (particulary photogravure).
- - Copying "viewpoints" in the 'camera obscura', that
is, obtaining images directly from nature (often taken
from a bedroom window), in black and white and with
true tonal values (a 'positive') by means of
differential changes in the solubility of bitumen of
Judea. This was the technique used for the view of
Niepce's estate, Le Gras, rediscovered in 1952. This
view from the window at Saint-Loup de Varennes (a
pewter plate undoubtely dating from 1826-1827) is in
the Gernsheim Collection at the University of Texas,
Austin."
Source: "A new history of photography", edited by M.
Frizot, p. 20, Koeneman 1998

The first technique is used in Nipce's "Cardinal
d'Amboise" from 1826 (1820?)(which looks as
"drawing"):
http://www.museeniepce.com/coll/nicephore_coll_09us.html
the second technique - the first "real" picture of the
barn in Le Gras - you can find here:
http://www.hrc.utexas.edu/photography/wfp/wfpmain.html

And both are photo-graphs.

Cheers

Adam
www.humanXL.com

__________________________________________________
Do You Yahoo!?
Everything you'll ever need on one web page
from News and Sport to Email and Music Charts
http://uk.my.yahoo.com
- --
To unsubscribe, see http://mejac.palo-alto.ca.us/leica-users/unsub.html