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what is formula of lens. The Lens Equation An image formed by a convex lens is described by the lens equation 1 u 1 v 1 f where uis the distance of the object from the lens. Therefore in 35mm format we measure power by dividing by 50.
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All distances are measured from the optical centre of the lens. 1f 1v 1-u. Sign Convention and Lens Formula.
However by long-standing tradition 50mm is considered a normal lens in the 35mm format even though technically speaking this isnt correct.
It may be written as. This is also known as diopter. Where v Distance of image from optical centre of lens u Distance of object from optical centre of lens. Where v Distance of image from optical centre of lens u Distance of object from optical centre of lens.
