Please use the American standard for number formatting rather than the European standard (i.e. for "two and a half," enter "2.5" rather than "2,5").
Description
Relate user supplied magnifying power to focal length and diopters of a lens. Calculator assumes 250mm as the near point of the human eye, closest distance the eye can focus for comfortable vision, in order to determine basic parameters for finding the best lens for one's desired magnification.
Please select your shipping country to view the most accurate inventory information, and to determine the correct Edmund Optics sales office for your order.
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报价工具
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