Orion 10029 StarBlast 90mm Altazimuth Travel Refractor Telescope (Burgundy) A great grab-and-go refractor telescope for beginners and experienced hobbyists alike 90mm (3.5 inch) aperture and 660mm focal length (f/7.3) provides nice views of a wide variety of objects in the night sky Easy-to-operate altazimuth mount equipped with slow-motion controls for convenient tracking of objects as they appear to move across the sky A perfect travel telescope for family road-trips and campouts Includes 25mm and 10mm 1.25 inch eyepieces, EZ Finder II aiming sight, comfortable 90-degree star diagonal, and more!