User contributions
- 01:26, 20 October 2017 (diff | hist) . . (+9) . . m User:TrishaBoyland4 (current)
- 01:56, 19 October 2017 (diff | hist) . . (+9) . . m User:TrishaBoyland4
- 12:27, 18 October 2017 (diff | hist) . . (-88) . . m User:TrishaBoyland4
- 00:20, 18 October 2017 (diff | hist) . . (+1,986) . . N User:TrishaBoyland4 (Created page with "What is an achromatic lens?<br><br>An achromatic lens or Achromat is a lens that is created for the purpose of limiting the consequences of lens(chromatic and spherical) aberr...")
