Astronomical Telescope Set, with Diagonal Mirror and Tripod, 25/50 Power, Educational and Fun, Ages 8 and Up. The Set includes a tripod and a diagonal mirror. This Telescope Set will be the starting point to you child's many hours of fruition, learning, and fun ! 25/50 power, objective diameter is 1.58" (40mm) Promotes child and adult interaction. Recommended Age Range: 8 and Up