Saturday, 25 December 2010

History of Photography part 2

1826 or 1827 - The first photograph was created by Frenchman Joseph-Nicéphore Niepce on a polished metal plate. He used a substance called Syrian Asphalt - bitumen compounds made from petroleum. the reuslts were still very imperfect.

1839 - a year considered to be the correct date of the invention of photography. Frenchman Louis Jacques Daguerre demonstrated a photographic image of the French Academy received as a result of the action of iodine vapor on a polished copper plate coated with silver. Daguerre method, called from the name of the creator dagerotype allowed to obtain a correct picture, but only in one copy, since the image formed on the plate was immediately a positive image.

Sunday, 19 December 2010

History of Photography part 1

Photography was invented in the nineteenth century. The basic instrument for creating an image was the camera obscura which was as far back in the past as in Ancient Greece.

Here are some important dates:

1556 - Georg Fabricius noted that silver chloride blacks under the influence of sunlight.

1724 - light sensitivity of silver nitrate is observed by Johann Heinrich Schulze.

1725 - Halle philologist won the race with first mapping of the image on the photosensitive emulsions prepared with silver chloride on the backing of white chalk.

"Prepared chalk respectively served as a substance designed to provide uniform coverage as the backing material emulsion. As a model for mapping the image he used opaque material in which he cut templates. Then the emulsion was irradiated in the sun for these templates. In this way, Halle obtained the first, but not preservable photographic image."