The celestron ultima refractor 80 straight spotting scope offers a step up in aperture from the 65mm offering 50 brighter images and comes standard with a 20 60x zoom eyepiece designed to perform well in a range of viewing situations its a great all around optical instrument because it is completely waterproof it can be used 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 ou