In optics and photography, the focal length is the distance from the optical center of the lens to the imaging sensor when the lens if focused at infinity. The focal length is measured in millimeters. Focal length directly affects the size of the image captured, as it changes the angle of...
Both compression and other types of distortion are useful tools not only in photography but also videography, where the choice of focal length can impact what is emphasized in a scene. Also, a great example of how these effects impact how a face is rendered to the viewer can be seen via ...
Some readers have objected to our use of the term "focal length" in our explanation above and have insisted that the technically correct term is "field of view." They are right, of course. So here’s the technically correct version: "The focal length of the lens used on a full-frame ...
Noun1.focal ratio- the ratio of the focal length to the diameter of a (camera) lens system f number,stop number,speed ratio- the relative magnitudes of two quantities (usually expressed as a quotient) Based on WordNet 3.0, Farlex clipart collection. © 2003-2012 Princeton University, Farl...
Some of the terms in photography can be a little confusing. Take focal length, for example. We know focal length refers to the lens on our camera, but what exactly is focal length?Understanding focal lengthwill help you know which lens to purchase and how to use it for a wide variety ...
Focal length is a number that is vital to photography and photogrammetry but often misunderstood. What is focal length? A strict technical definition of focal length is difficult without providing a lot of background in lens theory, so we will use a simplification. You can think of focal lengt...
Here you will find one or more explanations in English for the word Focal distance or length of a lens or mirror. Also in the bottom left of the page several parts of wikipedia pages related to the word Focal distance or length of a lens or mirror and, of course, Focal distance or ...
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We are using so many words here: prime lens, standard lens, normal lens, general purpose lens, portrait lens. Only the first has a real definition: a fixed focal length lens, a lens that is not a zoom. Even "normal lens", meaning a lens that approximates the field of view of the ...
By convention, the term Equivalent Focal Length definition is the focal length that a 35 mm film camera would use to see the Equivalent size Field of View as the compared digital camera sees with its own lens. A digital sensor CANNOT change the focal length of its lens (as some confusion...