The ED 8×42 and 10×42 are the newest additions to the Cygnus monocular family with a 5 year guarantee. The ED 8×42 and 10×42 are the newest additions to the Cygnus monocular family with a 5 year guarantee. 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. Specification: Eye Relief: 15.2mm Close Focus: 2m Field of view (degrees): 6.5° Field of view (1000m): 113m Dimensions: 147x73x53cm Weight: 325g Warranty: 5 years