Structuresbinoculars eye relief mm125 magnification12 objective lens mm50 typenormal materialrubber prism typebak4 field of view143m1000m exit pupil diameter mm31 best usehunting magnification10x to 149x eye relief range mm10mm 15mm exit pupil diameter range mm3 4mm objective diameter40 50mm field of view range120 150ft1000yds optical systemroof minimum focus distance m2m waterproof levelipx 7 optical coatingfully multi coated brandvisionki