Telephotography
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In our eReader you can find the full English version of the book. Read Telephotography 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 Telephotography
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Here the inner frame is wider at the top than at the bottom. 8 1 NEAR SUBJECTS 83 Taking the same example as before 5" positive working at f/4, 2j" negative, 10" extension, and optical interval " (a) Magnification = -}- 1 = 5 " (b) = f ^ 5 Intensity = f/4 X 5 = f/20 Focal length = 5 X 5 = 25 To find the circle of illumination, the expression on p. 85 should be used. When the power of the system is two, the diagonal of the largest plate illuminated is about equal to the extension. When the power... is higher, a smaller place is covered ; and, correspondingly, a lower-power system has more covering power. NEAR SUBJECTS HOW TO FIND THE EXTENSION FOR A PARTICULAR SIZE OF IMAGE OF AN OBJECT AT A GIVEN DISTANCE IT is possible to determine the magnification by treating the telephoto system as a positive lens, the positions of the principal points ot which are known, but it is generally easier to split the effect 84 TELEPHOTOGRAPHY up into the work done by the positive and the negative separately.
What to read after Telephotography?
You can find similar books in the "Read Also" column, or choose other free books by Lan-Davis, Cyril Frederick, 1887-1915 to read onlineMoreLess
To quickly assess the difficulty of the text, read a short excerpt:
Here the inner frame is wider at the top than at the bottom. 8 1 NEAR SUBJECTS 83 Taking the same example as before 5" positive working at f/4, 2j" negative, 10" extension, and optical interval " (a) Magnification = -}- 1 = 5 " (b) = f ^ 5 Intensity = f/4 X 5 = f/20 Focal length = 5 X 5 = 25 To find the circle of illumination, the expression on p. 85 should be used. When the power of the system is two, the diagonal of the largest plate illuminated is about equal to the extension. When the power... is higher, a smaller place is covered ; and, correspondingly, a lower-power system has more covering power. NEAR SUBJECTS HOW TO FIND THE EXTENSION FOR A PARTICULAR SIZE OF IMAGE OF AN OBJECT AT A GIVEN DISTANCE IT is possible to determine the magnification by treating the telephoto system as a positive lens, the positions of the principal points ot which are known, but it is generally easier to split the effect 84 TELEPHOTOGRAPHY up into the work done by the positive and the negative separately.
What to read after Telephotography?
You can find similar books in the "Read Also" column, or choose other free books by Lan-Davis, Cyril Frederick, 1887-1915 to read onlineMoreLess
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