From en.wikipedia.org Nadar was the pseudonym of Gaspard-Félix Tournachon. Nadar was born in April 1820 in Paris (though some sources state Lyon). He was a caricaturist for Le Charivari in 1848. In 1849 he created the Revue comique and the Petit journal pour rire. He took his first photographs in 1853 and in 1858 became the first person to take aerial photographs. He also pioneered the use of artificial lighting in photography, working in the catacombs of Paris. Around 1863, Nadar built a huge (6000 m³) balloon named Le Géant ("The Giant"), thereby inspiring Jules Verne's Five Weeks in a Balloon. Although the "Géant" project was initially unsuccessful Nadar was still convinced that the future belonged to heavier-than-air machines. Later, "The Society for the Encouragement of Aerial Locomotion by Means of Heavier than Air Machines" was established, with Nadar as president and Verne as secretary. Nadar was also the inspiration for the character of Michael Ardan in Verne's From the Earth to the Moon. On his visit to Brussels with the Géant, on 26 September 1864, Nadar erected mobile barriers to keep the crowd at a safe distance. Up to this day, crowd control barriers are known in Belgium as Nadar barriers. In April 1874, he lent his photo studio to a group of painters, thus making the first exhibition of the Impressionists possible. He photographed Victor Hugo on his death-bed in 1885. He is credited with having published (in 1886) the first photo-interview (of famous chemist Michel Eugène Chevreul, then a centenarian), and also took erotic photographs. From 1895 until his return to Paris in 1909, the Nadar photo studio was in Marseilles (France). Nadar died in 1910, aged 89. He was buried in Père Lachaise Cemetery in Paris.
From www.getty.edu The sun is only the practitioner, M[r]. Nadar is the artist who wants to give him some work. So wrote a critic of Gaspard Félix Tournachon in 1859. Tournachon's nickname, Nadar, derived from youthful slang, but became his professional signature and the name by which he is best known today. Poor but talented, Nadar began by scratching out a living as a freelance writer and caricaturist. His writings and illustrations made him famous before he began to photograph. His keenly honed camera eye came from his successful career as a satirical cartoonist, in which the identifying characteristic of a subject was reduced to a single distinct facet; that skill proved effective in capturing the personality of his photographic subjects. Nadar opened his first photography studio in 1854, but he only practiced for six years. He focused on the psychological elements of photography, aiming to reveal the moral personalities of his sitters rather than make attractive portraits. Bust- or half-length poses, solid backdrops, dramatic lighting, fine sculpturing, and concentration on the face were trademarks of his studio. His use of eight-by-ten-inch glass-plate negatives, which were significantly larger than the popular sizes of daguerreotypes, acccentuated those effects. At one point, a commentator said, "[a]ll the outstanding figures of [the] era--literary, artistic, dramatic, political, intellectual--have filed through his studio." In most instances these subjects were Nadar's friends and acquaintances. His curiosity led him beyond the studio into such uncharted locales as the catacombs, which he was one of the first persons to photograph using artificial light.