1826
JOSEPH NICEPHORE NIEPCE (1765-1833)
The first picture which is known to us with an eight hour exposure and  the insistence of Niepce.
The view from the window of his laboratory.

                    

1829
JOSEPH NICEPHORE NIEPCE (1765-1833)
The second known to us picture by Niepce.The original was lost during its transfer for restoration 
in the beginning of the 19th century

1835
WILLIAM  HENRY FOX TALBOT (1800-1877) 
The first paper negative, the most  popular photographic procedureup the the
 appearance of digital photography 

1837
LOUIS JACQUES MANDE DAGUERRE (1787-1851)
The first daguerrotype ,method which first gave the world the joy of photography

1840
HIPPOLYTE  BAYARD (1807 - 1887)
The unfairly treated by the political authorities pioneer of photography pictures himself 
as a man who has commited suicide.