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File:Back US2454686A (Zoomar, 1946).svg

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Summary

Description
English: Schematic of Back's varifocal lens (1946). Approximated from US Patent 2,454,686.
Date
Source Own work
Author Mliu92

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Captions

Schematic of Back's varifocal lens (1946)

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1 May 2023

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2e7722faf78faff1d3df3d32c5dd6ce0bed582df

9,182 byte

350 pixel

600 pixel

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Date/TimeThumbnailDimensionsUserComment
current16:12, 1 May 2023Thumbnail for version as of 16:12, 1 May 2023600 × 350 (9 KB)Mliu92Uploaded own work with UploadWizard

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