How to Choose And Use a Lens
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In our eReader you can find the full English version of the book. Read How to Choose And Use a 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 How to Choose And Use a Lens
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35 sideration. The novice finds it difficult to under- stand why some anastigmats can be furnished with a camera for only $5 increase in price while others cost $20 to $50 more. There are several reasons for the great range of prices. Manufacturing cost is the most important. A lens with simple construction and shallow curves can be ground and polished in a very small fraction of the time required for deeper curves. The cost of mounting and testing varies tremendously for different types of con...struction. In every instance, the faster the lens, the more difficult it is to secure perfection, so the higher must be the price. The construction is usually more complicated, because it is difficult to correct a large aperture with a simple form of construction. These causes may make an /:4-5 lens, for instance, cost more to manu- facture than one of a similar type working at /:6. 3. Speed, that desirable quality which allows very short exposures, must be paid for.
Some formulas allow much more complete cor- rection of certain optical errors than other apparently similar formulas.
What to read after How to Choose And Use a Lens?
You can find similar books in the "Read Also" column, or choose other free books by Frank Roy Fraprie to read onlineMoreLess
To quickly assess the difficulty of the text, read a short excerpt:
35 sideration. The novice finds it difficult to under- stand why some anastigmats can be furnished with a camera for only $5 increase in price while others cost $20 to $50 more. There are several reasons for the great range of prices. Manufacturing cost is the most important. A lens with simple construction and shallow curves can be ground and polished in a very small fraction of the time required for deeper curves. The cost of mounting and testing varies tremendously for different types of con...struction. In every instance, the faster the lens, the more difficult it is to secure perfection, so the higher must be the price. The construction is usually more complicated, because it is difficult to correct a large aperture with a simple form of construction. These causes may make an /:4-5 lens, for instance, cost more to manu- facture than one of a similar type working at /:6. 3. Speed, that desirable quality which allows very short exposures, must be paid for.
Some formulas allow much more complete cor- rection of certain optical errors than other apparently similar formulas.
What to read after How to Choose And Use a Lens?
You can find similar books in the "Read Also" column, or choose other free books by Frank Roy Fraprie to read onlineMoreLess
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