Celestron Ultima 100 – 45 Degree Spotting Scope is the largest aperture scope in the Ultima line. The 100mm Ultima offers more than 50% brighter images than the 80mm, allowing for better performance in low light conditions. The 100mm refractor features excellent multi-coated optics packed into a portable and durable refractor design and comes standard with a 22-66x zoom eyepiece. This series was designed to perform well in a range of viewing situations, making it a great all-around optical instrument. Youll love it for observing nature and long distance spotting and since it is completely waterproof you can feel comfortable using it in extreme weather. The green rubber optical tube allows for subtle observation in any nature environment. Ultima spotters are a great companion for any nature or outdoor enthusiast. Soft carrying case included.