Good scope?

Can anyone recommend a good scope for looking at your trichomes to tell when plant is ready to harvest? I've been thinking about the 420 scope but do not know how we'll it works. Any help or tips is appreciated

I use a 30 and 60x microscope that I bought on fleabay and it does the job, also if you have a smart phone you can download a magnifier app.

I like jewelry loupes over pocket scopes. Although if you really want to see detail and got extra money, get a digi USB scope