User contributions
- 17:15, 19 October 2017 (diff | hist) . . (-168) . . m User:ShirleyH22 (current)
- 18:37, 18 October 2017 (diff | hist) . . (+2,064) . . N User:ShirleyH22 (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...")
