Hnub no, lub laser rangefinder tsis yog khoom kim heev, raws li nws tau hais 5-7 xyoo dhau los, tab sis qhov tsim nyog. Yog tsis muaj kev ntsuas kab xev, nws yog ib qho nyuaj tsis yog hauv kev tsim kho, tab sis kuj nyob rau hauv kev kho zoo tib yam. Tsis tas li ntawd, niaj hnub no cov tswv tsev, cov tsim qauv thiab txawm tias cov neeg sawv cev ntawm cov khoom siv pej xeem siv cov rangefinders. Tam sim no muaj ntau tus lej ntawm cov roulettes nyob rau hauv kev ua lag luam, feem ntau qhov ntsuas qhov ntev tsis tshaj 50 meters, tab sis yog tias tsim nyog, koj tuaj yeem nrhiav cov khoom siv rau 70 thiab 100 meters