Telephotography : An Elementary Treatise On the Construction, And Application of the Telephotographic Lens
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In our eReader you can find the full English version of the book. Read Telephotography : An Elementary Treatise On the Construction, And Application of the Telephotographic Lens 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 : An Elementary Treatise On the Construction, And Application of the Telephotographic Lens
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To quickly assess the difficulty of the text, read a short excerpt:
— In general a (see Fig. 40) represents the measurement of the entire separation between positive and negative lenses.
f\~fi is the distance the component lenses must be separated in order that the focal length of the compound lens shall be infinite. (In the present case zs f-^^—f^=o, the lenses are in contact.) d represents the measurement of any increase in the separation greater than the difference between the focal lengths of the component lenses y"j —y^. (In the present case, d=a because y...|=/2.) (See Notes.) Fic.40.
a (here =d) Equivalent focal length a=f,; here-F Equivalent focal length If we know f^, f^, the focal lengths of the component lenses, a the entire separation, and d the interval as defined, we can find the focal length of the compound lens f, and its back focal length b f (see figure) from the following simple formulae : -/. x/..
BF = d ' d (3) (4) which tell us that : The focal length of the compound lens is found by multiplying the 55 TELEPHOTOGRAPHY focal lengths of its two components together, and dividing by th
What to read after Telephotography : An Elementary Treatise On the Construction, And Application of the Telephotographic Lens?
You can find similar books in the "Read Also" column, or choose other free books by Dallmeyer, Thomas Rudolphus, 1859-1906 to read onlineMoreLess
To quickly assess the difficulty of the text, read a short excerpt:
— In general a (see Fig. 40) represents the measurement of the entire separation between positive and negative lenses.
f\~fi is the distance the component lenses must be separated in order that the focal length of the compound lens shall be infinite. (In the present case zs f-^^—f^=o, the lenses are in contact.) d represents the measurement of any increase in the separation greater than the difference between the focal lengths of the component lenses y"j —y^. (In the present case, d=a because y...|=/2.) (See Notes.) Fic.40.
a (here =d) Equivalent focal length a=f,; here-F Equivalent focal length If we know f^, f^, the focal lengths of the component lenses, a the entire separation, and d the interval as defined, we can find the focal length of the compound lens f, and its back focal length b f (see figure) from the following simple formulae : -/. x/..
BF = d ' d (3) (4) which tell us that : The focal length of the compound lens is found by multiplying the 55 TELEPHOTOGRAPHY focal lengths of its two components together, and dividing by th
What to read after Telephotography : An Elementary Treatise On the Construction, And Application of the Telephotographic Lens?
You can find similar books in the "Read Also" column, or choose other free books by Dallmeyer, Thomas Rudolphus, 1859-1906 to read onlineMoreLess
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