Unit Photography
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In our eReader you can find the full English version of the book. Read Unit Photography Online - link to read the book on full screen. Our eReader also allows you to upload and read Pdf, Txt, ePub and fb2 books. In the Mini eReder on the page below you can quickly view all pages of the book - Read Book Unit Photography
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It is seen therefore that the value of the practical unit of actinicity is chosen purely for con- venience in practice just as the practical units in other departments of physics have been chosen.
44 UNIT PHOTOGRAPHY THE STANDARD TINTING MEDIUM Many speeds of dry plates and films are made, i. E. , many degrees of latent sensitiveness, but the author has found that the rate with which these emulsions visibly discolor on exposure to light is practically the same in all and for this reason all ord...inary dry plate and film emulsions may be considered as standards for measuring actinism until an international standard shall be adopted. On account of the greater ease in working, the tinting strips will be cut for the most part from the small sizes of roll film, which fact will practi- cally limit the standard to some half dozen different factories in the United States and in Europe. Avoid for this purpose films having any orthochromatic dye as they are thus rendered slower as to their tinting speed.
What to read after Unit Photography?
You can find similar books in the "Read Also" column, or choose other free books by Frank Morris Steadman to read onlineMoreLess
To quickly assess the difficulty of the text, read a short excerpt:
It is seen therefore that the value of the practical unit of actinicity is chosen purely for con- venience in practice just as the practical units in other departments of physics have been chosen.
44 UNIT PHOTOGRAPHY THE STANDARD TINTING MEDIUM Many speeds of dry plates and films are made, i. E. , many degrees of latent sensitiveness, but the author has found that the rate with which these emulsions visibly discolor on exposure to light is practically the same in all and for this reason all ord...inary dry plate and film emulsions may be considered as standards for measuring actinism until an international standard shall be adopted. On account of the greater ease in working, the tinting strips will be cut for the most part from the small sizes of roll film, which fact will practi- cally limit the standard to some half dozen different factories in the United States and in Europe. Avoid for this purpose films having any orthochromatic dye as they are thus rendered slower as to their tinting speed.
What to read after Unit Photography?
You can find similar books in the "Read Also" column, or choose other free books by Frank Morris Steadman to read onlineMoreLess
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