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Focal Distance Definition. Because the focal length measures a distance it uses units of. 11222017 The focal length f is the distance between the lens and the focal point. 6112020 The focal length is essentially the distance in millimetres that light travels inside the telescope from its entry point the aperture to the exit point the focuser where you place your eyepiece or your DSLR camera also called prime focus imaging. Princetons WordNet 000 0 votes Rate this definition.
In ophthalmology the distance from the optical center of a lens to the focal point. A The number itself refers to the measured distance between the point where light converges the nodal point and the image plane sensor when a subject is in focus at infinity. Focal length usually represented in millimeters mm is the basic description of a photographic lens. 6112020 The focal length is essentially the distance in millimetres that light travels inside the telescope from its entry point the aperture to the exit point the focuser where you place your eyepiece or your DSLR camera also called prime focus imaging. The distance of a focus from the surface of a lens or curved mirror Examples of focal length in a Sentence Recent Examples on the Web Where the Max does trump all the other iPhone cameras. You might think that using a lot of magnification would be a bonus when looking at a small object but all telescopes have a practical limit.
7112019 Focal length is the distance between the optical center of the lens and the camera sensor or film plane when focused at infinity.
2 Geometry The distance between any given point of an ellipse or hyperbola and one of its foci. Its the measure in millimeters of the distance between the rear nodal point and the focal point of the lens while the lens is focused to infinity. 2003-2012 Princeton University Farlex Inc. Based on WordNet 30 Farlex clipart collection. Look it up now. In early use also.