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Perfect Camera: The best Camera for the job, all things considered, is a 4x5 view camera, but many photographers prefer the convenience of working with a 4 x 5 press Camera for most of their setups, using a view Camera only where the corrections! or the long bellows are called for. There was a time when the 8 x 10 was the standard instrument for industrial photos,! but that's no longer the case. The 8 x 10 speeds production of prints in the darkroom, but slows production of negatives on the job. In those cases where a big production of prints is necessary, the method used by some large companies is to shoot the picture on 4 x 5 anyway, have one perfect enlargement made, then copy the enlargement on 8 x 10 film and use the copy negative for making as many contact prints as are required.Three requisites: (1) Very susceptible paper; (2) Very perfect camera; (3) Means of arresting the further action."21 Like Talbot, he sensitized paper with silver salts. Of his Camera we know nothing. His method of "arresting the further action" of light was an epochal contribution. He had noted in 1819 that the hyposulphite of soda dissolved silver salts; now, in 1839, he recorded his successful attempt to use this chemical to fix his photographs.
Daguerre continued alone. Although Isidore Niepce had succeeded to the partnership, he contributed nothing, in spite of Daguerre's constant urging. News of his secret experiments leaked out. Reviewing the Diorama show "The Valley of Goldau" in 1835, the Journal des Artistes noted that Daguerre has found out a method of receiving, on a plate prepared by him, the image produced by the Camera obscura, so that a portrait, a landscape or view of any kind, projected upon,this plate by the ordinary Camera obscura, leaves its impress there in light and shade, and thus makes the most perfect of drawings. A preparation applied to this image preserves it for an indefinite period. Physical science has, perhaps, never offered a marvel comparable to this. |
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