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- 02:59, 20 October 2017 (diff | hist) . . (-8) . . m User:AbrahamSherrard (current)
- 23:41, 18 October 2017 (diff | hist) . . (-191) . . m User:AbrahamSherrard
- 03:46, 18 October 2017 (diff | hist) . . (+2,110) . . N User:AbrahamSherrard (Created page with "What is an achromatic lens?<br><br>An achromatic lens or Achromat is a lens that's created for the purpose of restricting the consequences of lens(chromatic and spherical) abe...")