photographic historical technologies what started it all
TRANSCRIPT
Photographic Historical Technologies
What Started It All
Camera Obscura
• Dark box with hole in one end• Small hole would result in
inverted image on opposite wall• Latin for “dark room”• Also called a “pinhole camera”• Smaller the pinhole, sharper the
image• Check it out here
The basic pinhole camera setup: light rays from an object pass through a small hole to form an inverted image
Photo taken with a pinhole camera. Note the inverted image on the far wall.
Heliography
• Used bitumen on glass or metal, which hardened when exposed to light• Sprayed with oil of lavender
and white petroleum to dissolve the areas not affected by light• Check it out here
Remember this picture that Niepce took? This is a heliograph
Carbon Process
• Made photos very high quality and prevented them from fading
• Invented in 1855 by Alphonse Poitvein
• Mixed carbon, gelatin, coloring material and potassium dichromate
• Process still used• Check it out here
Ladies’ home journal 1932
Stereoscopic Photography
• 3D photography, introduced in in 1800’s• Takes two separate
photographs 2.5” apart to mimic human eye location• Check it out here