Niepce was a french inventor who first invented photography, and is most known for producing the worlds first photograph which was of a roof.
He used a non-lens contact-printing also known as the "heliographic process", but it was destroyed later, the earliest surviving example is from 1825. He used a camera obscure to produce the image on a sheet the size of 20.25 cm. He exposed the paper for 8 hours, which is why sun light illuminates the buildings on both sides.
Next came Talbot, he created his own photography process called the calotype process. He has been noted as one of the people who has made major contributions to the development of photography. His work led to the creation of the photoglyphic engraving process.
Daguerre was a French artist and was recognized for his invention of the daguerreotype of process of photography, each photograph was a unique image on a highly polished, silver-plated sheet of copper. It was from then on that photography started to be used as a medium for artistic expression.
In 1839 Talbot invented the negative/positive process which was used a lot in modern photography, he refers to it as photogenic drawings. Nadar started taking photographs in 1853, but first started ariel photography in 1858, and he introduced and pioneered the use of artificial lighting in photographs.
