The high magnification Geovid is recommended for detailed viewing and precise measuring over long distances. The housing is made of cast aluminum, not only to reduce weight but also for its special robustness. It is filled with nitrogen to eliminate fogging-up of the lenses. The precise processing typical for Leica guarantees that a LEICA GEOVID BRF remains fully operational even during inclement weather conditions - even down to five meters deep in water (16.5 ft). Its folding lines and the ergonomic design make the Geovid extraordinarily compact and space-saving. The way it fits in your hand is a feature that you will continue to notice, even after many ventures out in the field.