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HOW PHOTOGRAPHY BEGAN
The cameraEvolution of the photographic processEarly experiments
13 other sections not shown
absorbs acid angle aperture base brightness camera exposure characteristic curve chemical chloride coated colour temperature compounds concentration contrast copying couplers crystal cyan density depth of field developing agent diaphragm shutter diffuse distance effect electrons emulsion example exposed filter fixation focal length gelatin give glass grain green and blue hydroquinone hypo illumination increase intensity iodide lamp latent image layer lens lenses light source maximum measured metallic silver method metol negative material normal object obtained optical oxidising photographic material plane plate positive potassium Potassium ferricyanide produced range reaction reciprocity failure record reduced reflected resolving power screen sensitising sensitive material sensitometry shutter silver bromide silver chloride silver halide silver image silver iodide silver ions silver nitrate silver salts sodium solarisation soluble solution solvent specks spectrum speed straight line portion sulphite surface thiosulphate tion tone values transmitted tungsten ultra-violet wave-lengths yellow