The Sibley Field Guide to Birds of Western North America: Second Edition Monoculars light transmission

light transmission

With a wide range of interpupillary distance

Its color it turquoise

maximum contrast and minute detail definition are combined into these particularly compact and rugged binoculars

Negative ions are proven to eliminate dust

The Sibley Field Guide to Birds of Western North America: Second Edition Monoculars light transmissionThe second edition covers North American species of birds of the Rocky Mountains and west. This book includes illustrations of more that 777 species and regional populations, improved side by side comparison of species and much more. This is an informative and authoritative guide to the birds of Western North America.