Bushnell says its new 10×42 mm rangefinding binoculars will “usher in a new era of laser rangefinder technology.” They will be available for purchase in late July. They are also built tough—Bushnell’s engineers tested the waterproof bonds by submerging the binoculars in 1 meter of water for 30 minutes to check for any moisture penetration.Bushnell says its new 10×42 mm rangefinding binoculars will “usher in a new era of laser rangefinder technology.” They will be available for purchase in late July. They are also built tough—Bushnell’s engineers tested the waterproof bonds by submerging the binoculars in 1 meter of water for 30 minutes to check for any moisture penetration.