DESC: A variety of styles and features appeal to a wide range of users from students of nature to concertgoers. Outstanding light transmission through fully-coated optics ensures bright, crisp clear viewing. Standard-size models feature InstaFocus® for fast and easy focus on a moving target. The compact porro prism series provides great durability and performance in a smaller size. Our mid-size roof prism models with 32mm objectives provide increased brightness for low-light viewing conditions.