National Geographic 70 /350 Automatic Telescope. The telescope is perfectly suited for beginners or as a travel telescope. Take this telescope with you where ever you go..hiking camping on vacation. Specifications for National Geographic Automatic Telescope 70/350: Manufacturer: National Geographic Objective Lens Diameter: 70 mm Focal Length: 350 mm Package Contents: National Geographic Automatic Telescope 70/350 National Geographic 80-10171: 70 /350 Automatic Telescope