Hi RoyJohn,
Thank you for your message. I really appreciate your detailed answer. It is very helpful.
I guess I am confused myself, wanting to try to observe many things with only one microsocope.
Most of it, is due to the fact that there are so many new technologies especially with those digital microscopes i.e. industrial 3D camera x2000 with fast auto-focus. That make me think that it may be it is worth getting something like that to be versatile.
Cheers
LaurentB