Old vs New: Vortex Viper HD 8x42 binoculars (sku VPR-4208-HD) versus current model (SKU V200) | Best Binocular Reviews
Amazon.co.jp: VOR-S836 VORTEX Monocular Daha Prism Waterproof, 0.3 x 1.4 inches (8 x 36 mm) Effective Diameter : Electronics
Amazon.com: Vortex Optics Crossfire HD 8x42 Binoculars,Green & Peterson Field Guide to Birds of Eastern & Central North America, Seventh Ed. (Peterson Field Guides) : Electronics