With extra-low dispersion glass (which performs noticeably better in low light and high contrast conditions), the Viking Cygnus ED 10×42 monocular offers a high quality option when you need the sharpness and brightness of a 42mm objective binocular but not the weight. Robust and waterproof, the ED is covered in a rugged, durable and tactile armouring and the prominent focus wheel is designed for comfortable one-handed use.