Since my friend asked me this question, I thought it would be helpful to just post up my answer and other curious minds will be able to understand it.
I’m not a technical perfectly correct-term pro scientific engineer, so my explanation might not be “Scientifically Accurate” but I’ll explain it as I understand it. So, if you think your better answer will be better, post a comment with your version of the story. Here is the question: D**** Lim March 2 at 11:08am Eh, what it means by 80-200mm/FXX-FXXX. the milimeters means the distance from the object u can