File:Equal illuminance.svg

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Summary

Description
English: Diagram showing why two lenses, with different focal lengths but the same aperture setting, will produce the same illuminance in the focal plane. Focal lengths and aperture sizes are not to scale.
Source Own work
Author Markdaams

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Date/TimeThumbnailDimensionsUserComment
current13:12, 21 January 2010Thumbnail for version as of 13:12, 21 January 2010867 × 406 (13 KB)Markdaams{{Information |Description={{en|1=Diagram showing why two lenses, with different focal lengths but the same aperture setting, will produce the same illumination in the focal plane.}} |Source={{own}} |Author=Markdaams |Date= |Permission=

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