I had my students taking surprisingly good shots by just holding their cell phone lenses to the eyepiece of the old monocular scopes. They were way more enthusiastic about doing that, and then editing their photos to add arrows and comments, than they were about drawing what they saw by hand (which would have been easier)
RE: The Caterpillar Form Of Lophocampa caryae, The Hickory Tussock Moth