Created by one of the best optical glass manufacturers in the world, the Nikon ProStaff 3 Laser Rangefinder measures the distance of your target up to 550 yards away for a successful hunt every time. With gear perfect for the discerning hunter, Nikon uses a “Glass First Principle” – choosing a specific type of glass and selection of multi-coatings for each optic they create to maximize performance and provide superior image quality.