Photographic Objectives And Photo-Optical Auxiliary Appliances
Photographic Objectives And Photo-Optical Auxiliary Appliances
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In our eReader you can find the full English version of the book. Read Photographic Objectives And Photo-Optical Auxiliary Appliances 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 Photographic Objectives And Photo-Optical Auxiliary Appliances
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To quickly assess the difficulty of the text, read a short excerpt:
3, having a focus of 285 mm (IIV4 in.), on a plate measuring 13X18 cm (^VsX? in.) is scarcely noticeable, even in architectural views.
The Double-Protar, composed of two single lenses, is as fi-ee from distortion as any of the best existing symmetrical lenses; neither does it matter whether the combination consists of two lenses of similar or of dissi- milar focus. The combination of two lenses of similar focus possesses, however, the advantage, over those composed of two dissimilar foci, of ha...ving a larger relative aperture, hence greater rapidity. On the other hand, two dissimilar lenses provide a range of three foci, whereas two similar ones restrict the choice to two.
An assortment of more than two Protar-lenses of different focus forms a Protar-Set, the elements of which can be used singly or in pairs.
We supply any of these single Protar-lenses separately, having listed them under Series VII, with a view to facilitating the gradual acquisition of Double-Protars or of assorted sets of these lenses.
What to read after Photographic Objectives And Photo-Optical Auxiliary Appliances?
You can find similar books in the "Read Also" column, or choose other free books by Carl Zeiss (Firm : 1846) to read onlineMoreLess
To quickly assess the difficulty of the text, read a short excerpt:
3, having a focus of 285 mm (IIV4 in.), on a plate measuring 13X18 cm (^VsX? in.) is scarcely noticeable, even in architectural views.
The Double-Protar, composed of two single lenses, is as fi-ee from distortion as any of the best existing symmetrical lenses; neither does it matter whether the combination consists of two lenses of similar or of dissi- milar focus. The combination of two lenses of similar focus possesses, however, the advantage, over those composed of two dissimilar foci, of ha...ving a larger relative aperture, hence greater rapidity. On the other hand, two dissimilar lenses provide a range of three foci, whereas two similar ones restrict the choice to two.
An assortment of more than two Protar-lenses of different focus forms a Protar-Set, the elements of which can be used singly or in pairs.
We supply any of these single Protar-lenses separately, having listed them under Series VII, with a view to facilitating the gradual acquisition of Double-Protars or of assorted sets of these lenses.
What to read after Photographic Objectives And Photo-Optical Auxiliary Appliances?
You can find similar books in the "Read Also" column, or choose other free books by Carl Zeiss (Firm : 1846) to read onlineMoreLess
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