This Praktica CN10-40x28 zoom binocular is ergonomically designed for comfort during use. It also features a fold down rubber eye cups for spectacle weareres. The binoculars includes a 28mm objective lens which ensures the image is bright. An easy centre focussing ensures pin sharp image and user friendly zoom operation at your finger tips. It also has an impressive 10-40x zoom range which allows you to capture the smallest objects.