Lans Explained
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Lans Explained by W.S. Currie

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Published by Ellis Horwood .
Written in English

Subjects:

  • Computing and Information Technology

Book details:

Edition Notes

Series: Ellis Horwood Series in Computer Communications & Networking

The Physical Object
FormatPaperback
Number of Pages208
ID Numbers
Open LibraryOL10090134M
ISBN 100135235642
ISBN 109780135235645

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– Lens curvature, width, position, type of glass – Some can be fixed, other vary with focal length, focus (e.g. floating elements) – Multiplied by number of lens elements • Energy/merit function – MTF, etc. – Black art of massaging the merit function • Optimize for – . That allows you to do close-up work (like reading a book), middle-distance work (like checking out a website on a computer), or distance viewing (like driving) without needing to change your Author: Kathryn Whitbourne. Focal length is expressed in mm and a higher number means a bigger zoom, while a lower number mean the lens can be used for wider shots. As a rough reference, the .   So, a prime lens may show an aperture of f/ while a zoom lens may show an aperture of f/ Some zoom lenses only bear one aperture, and this shows it can achieve the same maximum aperture at both ends of the lens, which is desirable. Whatever your lens, you can find its maximum aperture written after its focal : Amateur Photographer.

What is Lens Focal Length. Focal length, usually represented in millimeters (mm), is the basic description of a photographic lens. It is not a measurement of the actual length of a lens, but a calculation of an optical distance from the point where light rays converge to form a sharp image of an object to the digital sensor or 35mm film at the focal plane in the camera. Reading glasses, available in over-the-counter or prescription versions, improve the ability to read something up close, such as a book or a computer screen. Alabama optometrist Dr. Samuel Pierce, past president of the American Optometric Association, says over-the-counter reading glasses — which can be purchased at drugstores, department. A progressive lens gives you three vision powers in one seamless lens for a more natural and flattering way to see your world. If you need more than one lens strength to read, do computer work or drive, progressives let you can see clearly at any distance with one pair of glasses. The maximum aperture is the largest opening (the smallest number) on the aperture scale that your lens is capable of opening to. Larger apertures like f or even f are highly desirable because they let in more light and allow you to shoot in low light conditions without getting camera shake. (for more on that read 5 Tips for getting.

Understanding Home Equity Loans. Related Book. Mortgage Management For Dummies. By Eric Tyson, Robert S. Griswold. Equity is the difference between what your house is worth in today’s real estate market and how much you currently owe on it. For example, if your home’s present appraised value is $, and your outstanding mortgage. About compatibility of Tokina interchangeable lenses with Nikon Z 6, Z 7 and Z 50 cameras (updated) Tokina Monthly Photo Contest – December winner announcement. atx-i mm F FF MACRO. g (Nikon F) g (Canon EF) and You can be featured on Tokina global social channels. IT’S VERSATILE – the 50mm lens is a great street shooting lens, not too wide, not too long. On a cropped or APS-C sensor (any non full frame camera body) it is also a great portrait lens, just long enough to remove distortion from your subject’s face and flatter them a bit more. Lens is the correct spelling. Lense is a misspelling that should be avoided. While the plural form of the word lenses does contain two “E’s,” the singular form contains just one. Contents [ hide] 1 What is the Difference Between Lens and Lense? 2 When to Use Lens. 3 When to Use Lense. 4 Trick to Remember the Difference. Post navigation.