I have both the 5x/10x/15x and the 60x-100x from radioshack. On the 5/10/15, its possible to put the 10 and 15 together and look through both at the same time, giving a greater magnification. Still, I found that it wasn't strong enough to examine trichs, so I had to use the 60-100x. The 60-100 is hard to hold still over the plant, so the best thing to do is cut off a small sample and examine it that way.