Multi Coated Optics, Maksutov-Cassegrain Optical Design, Compact and Portable Design, Erect Image System for Terrestrial and Astronomical Use, Built-in T-Adapter threads for Ease of Adapting SLR Cameras, Comes with 32 mm Eyepiece, 45 Degree Erect Image Diagonal and 8x21 Erect Image Finderscope, Backpack Made of Nylon, Limited Lifetime Warranty.,