Apresys eXpert 660 Hunting Rangefinder Magnification 6X / Effective Objective Lens diameter 24mm Angular Field of View (Apparent) ISO 14132-1:2002 : 40.3 Field of View @1000 yards/meters : 368 ft / 123m Measurement Range, minimum : 5 yards / Measurement Range, reflective : 660 yards Laser : Class 1 eye safe / Memory Function : 100 readings