Explore Scientific National Geographic CF700SM 70mm Refractor Telescope with Phone AdapterEmbark on a fascinating adventure through our solar system and beyond with National Geographics 70mm telescope. This refractor features a unique carbon fiber styling wrap that gives it a rugged edge and a 70mm aperture that will perform well in lunar, planetary, and deep sky observing situations. Its manageable 700mm focal length makes it highly portable and results in a versatile f 10 focal ratio that offers both wide fields and high powered views.