Focal length - Wikipedia, the free encyclopedia
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The focal length of an optical system is a measure of how strongly it converges (focuses) or diverges (defocuses) light. For an optical system in air, it is the distance over which initially collima...
en.wikipedia.org/wiki/Focal_length
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This page is useful to calculate the required lens focal length to take a picture of an object of size yo at a distance xo in order to generate an image of size yi on the film (or the CCD/C-MOS imager). The film plane is located at a distance xi.
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www.giangrandi.ch/optics/lenses/focalcalc.html
www.giangrandi.ch/optics/lenses/focalcalc.html
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Computer Modules, kowa, calculate focal length, microscope basics, navitar, navitar lenses, lens selction. ... This page has a CALCULATOR below to help you determine the focal length of the lens you need to order from us to fill up most of your CCD (or other image sensor types). We assume a C mount lens...
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www.compumodules.com/image-processing/focal-length-calc...
www.compumodules.com/image-processing/focal-length-calculator.shtml
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･ 1 Determine the object distance. This is the distance of a particular object from the surface of the... ･ 2 Enter the object distance into the following formula: 1/F = 1/Do + 1/Di. The distance should go in... ･ 3 Determine the image dist...
http://www.ehow.com/how_5376013_calculate-focal-length-...
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･ 1 Draw a box on a piece of graph paper. This box represents the area in which your objects and your mirror... ･ 2 Within the box, mark the location of the object or objects that you wish to see in your mirror. This... ･ 3 Mark on your gra...
http://www.ehow.com/how_4778270_calculate-focal-length-...
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alculate Object Dimension, Object Distance, Focal length ... Enter Focal Length " " by millimeters millimeters ... Focal Length Calculation; Enter 2 figures in the column and click "calculate".
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www.canon.com/bctv/calculator/calculator3.html
www.canon.com/bctv/calculator/calculator3.html
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Calculation of Focal Length ... To calculate the focal length needed: Formula:; ... Example:; What focal length is needed for an object be 20ft high at a distance of 200 feet using a 2/3" camera?; (Note: Formula will work using feet or meters for the variables);
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www.isorainbow.com/tech/formula.html
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This page contains a small tool, to quickly and easily calculate the required focal length of a lens. However, the result is only theoretical and the calculated optic is not necessarily available.
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www.stemmer-imaging.co.uk/en/pages/service/focus.php
www.stemmer-imaging.co.uk/en/pages/service/focus.php
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It is used for determining the focal length of a thin lens (thickness = 0) with radii of curvature r1 and r2. The focal length of a lens in air can be calculated from the lensmaker's equation. ... Related Articles: >> How to calculate Centripetal Acceleration for Circular Motion.(A simple tutorial); >>
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easycalculation.com/physics/classical-physics/lens-make...
easycalculation.com/physics/classical-physics/lens-maker.php
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