Young Astronomers Can Observe The Skies With The Tele-Science 25/50 Power 40 Mm Astronomical Telescope .25/50X 40 Mm Astronomical Telescopic View With Diagonal Mirror (Installed) And Tripod For Stable Stargazing .Full Version Of Stargazing App “Star Walk 2” Included (Smartphone Is Not Included) .Objective Diameter 40 Mm .Focal Length 500 Mm .Eyepieces 20 Mm, 10 Mm .Diagonal Mirror Accessory .