User contributions
- 21:27, 18 October 2017 (diff | hist) . . (-5) . . m User:BernieceWithersp (current)
- 18:26, 18 October 2017 (diff | hist) . . (-100) . . m User:BernieceWithersp
- 13:43, 18 October 2017 (diff | hist) . . (+2,016) . . N User:BernieceWithersp (Created page with "What's an achromatic lens?<br><br>An achromatic lens or Achromat is a lens that is produced for the purpose of limiting the effects of lens(chromatic and spherical) aberration...")
