The First Photograph Ever Taken “View from the Window at Le Gras” [Circa, 1826]
The First Photograph, or more specifically, the world’s first permanent photograph from nature, was taken by Joseph Nicéphore Niépce in 1826 or 1827. The image depicts the view from an upstairs window at Niépce’s estate, Le Gras, in the Burgundy region of France.
Earliest Known Photograph 
Earliest known, surviving heliographic engraving in existence, made by Nicéphore Niépce in 1825 by the heliography process. His illustration is of an etching printed from a metal plate that was etched following alteration of the ground by sunlight; the image is of a 17th Century Flemish engraving showing a man leading a horse. (via)
The First Photograph of a Human ”Boulevard Du Temple” [Paris, 1838]
Boulevard du Temple, taken by Louis Daguerre in late 1838, was the first-ever photograph of a person. It is an image of a busy street, but because exposure time was over ten minutes, the city traffic was moving too much to appear. The exception is a man in the bottom left corner, who stood still getting his boots polished long enough to show up in the picture.
The First Light Picture and Human Potrait Ever Taken [Oct,Nov 1839]
Robert Cornelius, self-portrait, Oct. or Nov. 1839, approximate quarter plate daguerreotype which is a procedure invented in 1839 using silver on a copper plate. The back reads, “The first light picture ever taken.” This self-portrait is the first photographic portrait image of a human ever produced.
Roger Fenton’s Photographic Van 
Roger Fenton (20 March 1819 – 8 August 1869) was a pioneering British photographer, one of the first war photographers. In 1855 Fenton went to theCrimean War on assignment for the publisher Thomas Agnew to photograph the troops, with a photographic assistant Marcus Sparling and a servant and a large van of equipment. Despite high temperatures, breaking several ribs, and suffering from cholera, he managed to make over 350 usable large format negatives. An exhibition of 312 prints was soon on show in London.
Phineas Gage (Around 1850)
A daguerreotype image believed to be of railway worker Phineas Gage holding a tamping iron that went through his head during an explosion on a worksite in 1848. Phineas P. Gage (July 9?, 1823 – May 21, 1860) was a railroad construction foreman now remembered for his incredible survival of an accident in which a large iron rod was driven completely through his head, destroying one or both of his brain’s frontal lobes, and for that injury’s reported effects on his personality and behavior—effects so profound that friends saw him as “no longer Gage.” Gage recovered from the accident and retained full possession of his reason, but his wife and other people close to him soon began to notice dramatic changes in his personality. Phineas Gage’s brain was not subjected to any medical examination at that time, but seven years later his body was exhumed so his skull could be studied. Today Gage’s skull is on permanent display at Harvard’s Countway Library of Medicine.
Bridge of Boats over Indus Attock [SubContinent 1861]
Attock a part of Pakistan now passed one of the biggest rivers in the world, the Indus connecting the India and Pakistan largest canal system in the world before the Pakistani Independance.
The Photo of the first Photographic Studio 
A photographer appears to be photographing himself in a 19th-century photographic studio.
First Color Photograph 
Although color photography was explored throughout the 19th century, initial experiments in color resulted in projected temporary images, rather than permanent color images. Moreover until the 1870s the emulsions available were not sensitive to red or green light.The first color photo, an additive projected image of a tartan ribbon, was taken in 1861 by the Scottish physicist James Clerk Maxwell.
First Subtractive Color Photograph 
Before the autochrome process was perfect in France, this photograph was taken by Louis Arthur Ducos du Hauron who invented the subtractive (cyan, magenta, and yellow) color method of taking photographs. Louis was a French pioneer in color photography and he worked in both subtractive and additive (red, green, and blue) color. This particularly photograph is called “Landscape of Southern France”.
First High Speed Photograph 
In 1887, using a series of trip wires, Eadweard Muybridge created the first high speed photo series which can be run together to give the effect of motion pictures. High speed photography is the science of taking pictures of very fast phenomena. In 1948, the Society of Motion Picture and Television Engineers (SMPTE) defined high-speed photography as any set of photographs captured by a camera capable of 128 frames per second or greater, and of at least three consecutive frames.
First Autochrome Lumière 
It is an early color photography process. Patented in 1903 by the Lumière brothers in France and first marketed in 1907. It remained the principal color photography process available until it was superseded by the advent of subtractive color film during the mid 1930s.
First Digitally Scanned Photograph 
The first image scanner ever developed was a drum scanner. It was built in 1957 at the US National Bureau of Standards by a team led by Russell Kirsch. The first image ever scanned on this machine was a 5 cm square photograph of Kirsch’s then-three-month-old son, Walden. The black and white image had a resolution of 176 pixels on a side. Technically, this is the very first digital photograph – all these years later, digital cameras are only just beginning to have the full capabilities of film cameras. (Via)