The best way to use the pocket microscope, is to snip very small samples of the bud leaf, using small scissers and twizzers. Then put the samples on a white paper plate and place the microscope over the sample. I like the 60X setting, with the built-in light on. I take several samples; top, middle and bottom of plant. You should look for the AVERAGE % over the whole plant....enjoy...imp:

I just don't have the eyes or steady hand, to use a loupe.