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Focal Length (mm): --
Diopters (1/m): --
| $$ \text{FL} = \frac{250 \text{mm}}{\text{MP}} $$ |
| $$ \text{Diopters} = \frac{1000 \text{mm}}{\text{FL}} $$ |
| MP | Magnifying Power |
| FL | Focal Length |
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.
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