With this lightweight and durable telescope, young scientists can explore the natural wonders of Earth or the craters of the moon and beyond. The all-glass optics and magnification provide clear, up-close images of birds, animals, distant treetops, as well as celestial objects. Plus, it's easy to use and perfect for backyard exploring, camping trips and vacations. Both children and adults will enjoy hours of discovery and observation fun. The Educational Insights Vega 360 Telescope is a great introductory telescope to young astronomers ages eight and up. Optical Design: Reflector; Overall Focal Ratio: f/7; Aperture Size: 50 mm; Overall Focal Length: 360 mm.