The Simmons ProSport 8-17x 25mm Zoom Binocular has a reverse Porro prism design to provide a lighter weight more compact binocular. The very practical 10 ounces coupled with the close focus of less than 10 feet create the ingredients to be able to instantly leverage that one afternoon when a red-tailed hawk lands on the tree outside your kid's bedroom window. A very comfortable 216 foot field of view scans the possibilities with its 25mm objective. Multi coated lenses deliver brighter, sharper images with higher contrast. Tactile and ridged rubber armoring add shock, bump and scratch protection for more rugged moments. This is a good binocular to always have available regardless of what the application demands.