The Steiner Merlin offers high performance for faster discovery, especially of birds on the move. They are precise, light weight, yet amazingly rugged and fully waterproofed for even the rainiest days. The optics are made with premium optical glass and are coated with natural color transmission multi-coating, which boosts light transmission much higher - yielding extraordinary clarity, resolution and color fidelity. The unique "Fast-Focus" system turns from close focus to infinite distance in two full turns of the focus wheel, for razor sharp fine tuning. The focusing is smooth and precise. The almost transparent neutral color on the exterior of the Merlin is a unique earth tone brown; chosen by Steiner's development staff and birders as a color least noticeable to birds. The best brightness and widest field of view of the Merlin Series. This is the best all around size and model for most all birding applications. The brightness and field of view have many benefits, especially in lower light or following birds in flight. Weight: 26 oz. Field of view: 348 feet @ 1000 yards. Eye relief: 19mm. Dimensions: 6.4" L x 5.2" W x 2.2" H. IP (Inter Pupil) Distance: 57-73mm.