Hunt, Robert, 1807-1887, author, Contained in (work): Hunt, Robert, 1807-1887. Manual of photography · London ; Glasgow : Richard Griffin and Company · leaf 133
CHAPTER XYI. GENERAL REMARKS ON THE USE OF THE CAMERA OBSCURA.- THE PHOTOGRAPHIC PENTAGRAPH. The following remarks will apply with equal force to all the pro- cesses by which views of external objects can be obtained ; but they have more especial reference to those highly sensitive ones, the… … Fig. 56. minute or ten may be con- sumed in the operation of obtaining its impression. With the human figure and animals the case is very different : the utmost concentration of the solar radiations is therefore required to insure rapidity of action. This is effected by the double combina- tion of…
Photography
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