User contributions
- 20:55, 19 October 2017 (diff | hist) . . (+33) . . m User:ThurmanUlrich (current)
- 03:32, 19 October 2017 (diff | hist) . . (-187) . . m User:ThurmanUlrich
- 22:43, 18 October 2017 (diff | hist) . . (+2,072) . . N User:ThurmanUlrich (Created page with "What's an achromatic lens?<br><br>An achromatic lens or Achromat is a lens that is created for the purpose of limiting the effects of lens(chromatic and spherical) aberration....")
