Really you need a 30x pocket magnifying glass. More then that and it's too much you don't get the field of view you need. 100x is way too much. The idea is to view the color of the trichome and the ability to view many trichomes in the same view so you can see the average.

There is an FAQ that may help you.
Zandor Reviewed by Zandor on . Looking at trichomes to determine harvesting time? I was wondering is magnifying the trichomes of buds is a reliable way to determine when you should harvest your plant? Also if it is (and only if it is lol) what magnification level should my magnifier have..like.. should I get a 10x or higher? I've read alot about it but I just wanted like more info because it seems like it's more interesting than it used to be. Rating: 5