Some of us have been around long enough to remember using these but there are probably very few now days. I have two of the Zeiss version. I use to pack this beast wrapped in foam (without the case) on my pack frame back into places to get a range map. Typically a blown up picture or a drawing with landmarks ranged. Everyone that is new to long range shooting should thank the inventors of laser rangefinders. At 1500+ a pop and 25+ pounds packing one wasn't for the faint of heart. This one is good to 10,000 meters.