The Fieldmaster-A90R offers large aperture & high magnification performance at a remarkable price. The spotting scope is clad in stylish black rubber armouring to protect against knocks and is waterproof and nitrogen-filled for fog-free viewing. Lightweight polycarbonate body. Features a TRIPLET objective lens, BaK-4 Prisms, fully multi-coated optics and an extendable dew shield/sun shade.