Heinrich Tønnies
Videos
Johan Georg Heinrich Ludwig Tønnies was an early German-Danish photographer who had a studio in Aalborg, Denmark.
Heinrich Tønnies: self-portrait
Heinrich Tønnies: Jens Bangs Stenhus (c. 1890)
History of photography
Videos
The history of photography began with the discovery of two critical principles: The first is camera obscura image projection; the second is the discovery that some substances are visibly altered by ex
A salted paper print taken by Roger Fenton of his assistant and photographic wagon, 1855
Principle of the camera obscura
Principle of a box camera obscura with mirror
Physiognotrace of Hans Lindholm by Gilles-Louis Chrétien