I am so impressed with the Trekker microscope; this is a wonderful instrument! I looked at sand, ants, live spiders in vials, pine nut wings, dragonfly wings and anything else I could lay my hands on. Leaves of various plants too – I could even see the oil glands! Everybody in the group took a turn with the Trekker, and there was a constant explosion of “Wow! You just gotta see THIS!!” I was able, with this little scope, to identify a spider the size of a pinhead as a mature female Linyphiid – a LIVE spider, in a vial, which I simply held in place with two fingers. I accidentally spilled alcohol on the scope, and there was no trace at all. Most of the time I used it with ambient light and it had great depth of field and resolution. I shut my eyes, clenched my jaw and dropped the Trekker. Not even a scratch on the housing.It’s a full working scope! This one is becoming my personal scope – I’m buying it a tripod this weekend. I really like the way it fits in a pocket of my field vest. I also pulled out the eyepiece and used it as a loupe, with very satisfactory results.All in all, this is an excellent instrument. I love it! Thank you for sending it for review! Suzanne Ubick, California Academy of Sciences