Revision history of "User:EthelBackhouse"

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  • (cur | prev) 17:39, 19 October 2017‎ EthelBackhouse (talk | contribs)‎ . . (1,972 bytes) (+1,972)‎ . . (Created page with "What's an achromatic lens?<br><br>An achromatic lens or Achromat is a lens that is created with the goal of limiting the effects of lens(chromatic and spherical) aberration. A...")
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