Hawke Endurance ED 20-60x68 Angled Spotting Scope Following the success of the Endurance ED binoculars, Hawke have also introduced a range of Endurance ED Spotting Scopes with superior optical performance. From the extra-low dispersion (ED) glass, to the dielectric coatings, the optical quality on this scope is second to none at this price range. High Quality ED Glass ED glass is specially formulated and helps to greatly reduce chromatic aberration so that you experience little to no “colour fringing”. This means that the Endurance ED scope produces sharper images with better contrast and due to the better light transmission outstanding true-to-life colour. These differences become even more apparent when lighting conditions are dim, like at dawn or dusk. Dual-focus for precision tuning Another advantage of the Endurance ED Spotting Scope is the enhanced dual-focus wheel for precision tuning. At much higher magnifications the depth of field becomes very shallow and the