1 page matching aperture lens uniform-system date:0-1930 in this book
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The Beginnings of Photography
Light and Vision
8 other sections not shown
absorbs achromatic lens acid Anastigmat blue brightness bromide paper called camera chemical coated contact print Contrast Velox correct exposure curve dark density depth of focus dissolved elon emulsion enlarging exposed to light film fixing bath focal length give glass grains of silver green halation highlights hydroquinone hypo increase of exposure jelly Kodak lamp lenses light falling Meniscus Lens metallic silver minutes nega negative obtained opacities orange orthochromatic over-exposure period of correct photograph picture pinhole plate portion potassium bromide printing paper produced pyro range of tones Rapid Rectilinear ray of light reducer reflected Regular Velox require retina salt scale sensitive to light sepia shadows sharp shown in Fig silver bromide silver chloride silver deposit silver iodide silver nitrate silver sulphide soluble Special Velox spectrum stop substances sulphur swell tion tive transparent ultra-violet violet visible washing wave length white paper yellow