With its wide 50mm objective lenses and high magnification,these rugged, all-weather Canon Image Stabilizer binoculars are destined to set a new and higher benchmark for image brightness, clarity and ergonomic design. Built-in Image Stabilizer (IS) provides shake-free performance. High magnification ratio: 18X. Ultra-low dispersion (UD) glass elements for exceptional image quality. Doublet field-flattener for sharp, distortion-free images from edge-to-edge. Extra-bright, large diameter 50mm objective lens. Long eye relief: 15mm. Water-resistant construction with non-slip rubberized grip.