Ideal for the observer who views both astronomical and terrestrial objects, the Meade Infinity Series combines an altazimuth mount and quality optics for a superb value. For newcomers and beginners alike, these refracting telescopes are a great way for you to discover the cosmos and the outdoors. You’ll discover more with the Meade Infinity Series. The Meade Infinity 50 Refractor telescope is a great telescope to introduce a younger audience to astronomy. This 50mm (2.0") aperture gives bright, sharp images for both land and celestial objects. Whether you"re viewing the lunar craters, Jupiter, or terrestrial objects, the Infinity 50 Refractor allows the first-time observer to explore the world around them. Pros: Right-side up image means you can use it for daytime observing (birds, hunting, ocean, etc) Easy assembly Refractor means you don’t have mirrors to align (collimate); it’s ready to go out of the box Cons: Tracking celestial objects is less easy than an EQ mount because the controls function left, right, up, down whereas EQ mounts turn with the rotation of the Earth No slow motion controls Q: How is this telescope different than the other Infinity models (90, 80, 70, etc)? A: The differences between each model are aperture size. The bigger the aperture, the more light-gathering power the telescope will have, resulting in brighter, detailed images. The Infinity 50 has a 50mm aperture, a smaller aperture size than the other Infinity telescopes, but also has the lowest cost.