Photographic Instruction Text: A Systematic Course and Working Guide in All the Processes which Ordinarily Take Up the Attention of Camera Workers (Google eBook)

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Photo-text Press, 1900 - Photography - 237 pages
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Page 91 - ... water to which a few drops of sulphuric acid have been added.
Page 188 - Photographic instruction text; a systematic course and working guide in all the processes which ordinarily take up the attention of camera workers.
Page iv - Jtre the most perfect color sensitive plates in the market MADE IN THREE GRADES OF SPEED Slow, Medium and Instantaneous FOR SALE BY ALL PHOTO SUPPLY DEALERS * JW nntiffictured by G.
Page 72 - ... image points superimposed. Say that by the use of a diaphragm both lose an image point; the ratio becomes one to nine, an evident increase of contrast. It is not fair to suppose that a shadow will always lose equally with...
Page 5 - It is intended to acquaint one with practice and reasons in a logical order and to give a systematic knowledge which will enable an old or new worker to work intelligently...
Page 57 - Although bromide is not recommended in the instructions, a few drops of a ten per cent. solution to the ounce of developer is advisable.
Page 72 - ... one part of it from another. Contrast results from a decrease of detail. When one part is left vacant by loss of detail, its vacancy stands out in contrast to the imagery of an adjoining part. Or, from another standpoint, the relative intensities of light falling upon certain shadows and...
Page 72 - The decreased illumination with smaller opening is obvious enough. The decrease in detail occurs because some of the partial images which make up the full image are taken away. Do not confuse definition with detail. Detail pictures the parts of a view, while definition distinguishes one part of it from another. Contrast results from a decrease...

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