User contributions
- 22:16, 18 October 2017 (diff | hist) . . (-239) . . m User:CindySouthern7 (current)
- 17:54, 18 October 2017 (diff | hist) . . (+2,135) . . N User:CindySouthern7 (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 restricting the consequences of lens(chromatic and spherical) aberr...")