If I had not thought of at this price: Stable ducted in metal pocket magnifier, crystal-clear lens. Need it for mineralogical and petrographic studies in the field. The picture is crystal clear, every detail can be seen. Even an eyelet for attaching to a lanyard exists because one has the Prospecting always have both hands free. Can I recommend it! If you take two, at the good price not that bad, just in case one is lost.