Steiner Optics Navigator

7x Magnification - is the marine standard, with a wide, stable image for tracking other boats, buoys and bridge numbers even in rough water; High Contrast Optics - provide bright, sharply contoured images with natural color definition for outstanding viewing quality suitable for both beginners and professionals; Floating Prism System - uses flexible silicone lens mount to absorb severe shock, impact and abuse without damage; Sports-Auto Focus System - lets you focus each eyepiece to your vision once, then keeps images razor sharp from 20 yards to infinity. No more chasing focus on moving objects; Makrolon housing - is durable polycarbonate with NBR Long Life rubber armoring, creating a lightweight, rugged chassis that withstands 11 Gs of impact. Impervious to harsh conditions for generations of trusted use; N2 injection system - seals 14-psi pressurized dry nitrogen into the optic, for fogproof clarity in any condition - from artic cold to desert heat