This pocket magnifier is an absolutely essential bit of kit for any budding entomologist (that's a 'bug hunter' to you and me).
They're a couple of centimetres across and they have 30x magnification to bring tiny features of plants and animals up close. And, as you can see, you can pair it up with a mobile phone camera to record the teeny tiny features that you have magnified.
Oh, and for the record, I always have one of these in my pocket, and in my car in case I see something when I am not expecting to.
I managed to get hold of a small stock of these magnifiers which are available for posting more or less straight away.