Owners Manual & User Guide for  Barska CO11338 10-30 x 60mm Colorado Binoculars w/ Reverse Porro Prism, 10-30x Magnification, BK-7 Prism Glass, Blue Glass, Fully Coated Lenses, Large Center Focus Knob & Rubberized Exterior - binocular_manual_bc152%5B1%5D.pdf