history of photography super intresting presentation 100% true informations, it can provide u with a lot of interesting facts about photography and history of photography and the how it started before ccamera was invented, hope this presentation will be useful for the people who are intresting in the major of cinema or photography and for the newbies to get educated and to know about history of photography before they get into it

1. History of photography

2. • The word photography is derived from the
Greek words:
Photos=light
Graphein=writing , drawing
Photography is writing with light.

3. Definition
• Photography is the art to fix from the action
of the light, the image of an object onto a
sensitive surface (paper,
film/negative/pellicule, plate…)

4. • 1839, is the year of the invention of
photography.
• Photography is half art half science.

5. Camera obscura
• Since at least the time of Aristotle, it had
been known that the rays of light passing
through a pinhole would form an image.
• The 10th-century Arabian scholar Alhazen
described the effect in detail and told how
to view an eclipse of the sun in a camera
obscura (dark chamber) a darkened room
with a pinhole opening to the outside.

6. • By the time of the Renaissance, a lens had
been fitted into the hole to improve the
image, and the room-sized device had been
reduced to the size of a small box that could
be easily carried.
• The camera obscura became a drawing aid
that enabled an artist to trace an image
reflected onto a sheet of drawing paper.

9. Inventors of photography
• 1- Joseph Nicephore Niepce:(1765-1833)
• He was the first to fix the photographic
image (1826) using the camera obscura.
• He experimented with silver chloride,
which he knew darkened on exposure to
light, but then turned to bitumen of judea, a
kind of asphalt that hardened when exposed
to light.

10. • He coated a sheet of pewter, and placed it in a
camera obscura aimed through an open window at
his courtyard and exposed it for 8 hours.
• The exposure time was so long, that the sun
moved across the sky and illuminated both side of
the courtyard.
• He named the process heliography(from Greek
helios = sun, and graphos =drawing).
• After his death, Daguerre continued to experiment.

11. 1826

12. • 2- Louis Jacques Mande Daguerre(1799-1851)
• Soon he had discovered a way of developing
photographic plates, a process which reduced the
exposure time from 8 hours down, to half an hour.
• His invention called Daguerreotype, was made on
a highly polished surface of silver that was plated
on a copper sheet and developed after exposed
with heated mercury.

13. • The daguerreotype was very popular in its
time.
• Each plate was unique and there was no
way of producing copies except by
rephotographing the original.

14. 1840?

15. • 3- William Henry Fox Talbot(1800-1877).
• His first experiments had been with negative
silhouettes made by placing objects on sensitive
paper and exposing them to light.(photogramme).
• In 1840 Talbot announced a technique that
became the basis of modern photography.
• He called his invention a calotype( after the
Greek, kalos = beautiful, and typos = impression).

19. • An infinite number of positives could be
made from a single negative, which was to
provide the answer to the daguerreotype
problem.