The Progress of Photography Since the Year 1879 a Review of the More Important
The Progress of Photography Since the Year 1879 a Review of the More Important
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In our eReader you can find the full English version of the book. Read The Progress of Photography Since the Year 1879 a Review of the More Important 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 The Progress of Photography Since the Year 1879 a Review of the More Important
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Kayser has used Atwood's Gravity Machine for these calculations, with excellent success. As the machine may easily be made to give a falling body a known rate of speed (about twenty-seven inches per second), the body may be photographed and the rapidity of the shutter registered to one one-thousandth of a second. (Phot. Mitth. , xix. Juliheft ii. ) Boca's Shutter. — This invention of a Parisian has the peculiarity of permitting the exposure to be Ineasured. It has a clock movement with a hand 1...6* 186 PHOTOGRAPHIC APPARATUS.
traversing the dial in three seconds. The dial is marked off in three parts, each part being subdivided into 50° of Avhich each one represents one-Hftieth of a second. The shutter itself consists of two disks rotating in their own planes b}^ a spring-motor; one opening the lens and the other closing it. The ex- posure is made by pressure on the button that starts the clock-work and the disks together, the hand on the dial pointing to 0. If exposures of the -^, ^ or ^ of a second are desired, the hand is made to point to tlie first, second, third, or fourth degree from the Ijefore starting.
What to read after The Progress of Photography Since the Year 1879 a Review of the More Important?
You can find similar books in the "Read Also" column, or choose other free books by Hermann Wilhelm Vogel to read onlineMoreLess
To quickly assess the difficulty of the text, read a short excerpt:
Kayser has used Atwood's Gravity Machine for these calculations, with excellent success. As the machine may easily be made to give a falling body a known rate of speed (about twenty-seven inches per second), the body may be photographed and the rapidity of the shutter registered to one one-thousandth of a second. (Phot. Mitth. , xix. Juliheft ii. ) Boca's Shutter. — This invention of a Parisian has the peculiarity of permitting the exposure to be Ineasured. It has a clock movement with a hand 1...6* 186 PHOTOGRAPHIC APPARATUS.
traversing the dial in three seconds. The dial is marked off in three parts, each part being subdivided into 50° of Avhich each one represents one-Hftieth of a second. The shutter itself consists of two disks rotating in their own planes b}^ a spring-motor; one opening the lens and the other closing it. The ex- posure is made by pressure on the button that starts the clock-work and the disks together, the hand on the dial pointing to 0. If exposures of the -^, ^ or ^ of a second are desired, the hand is made to point to tlie first, second, third, or fourth degree from the Ijefore starting.
What to read after The Progress of Photography Since the Year 1879 a Review of the More Important?
You can find similar books in the "Read Also" column, or choose other free books by Hermann Wilhelm Vogel to read onlineMoreLess
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