Orion 9515 BT100 Premium Binocular Telescope Binocular-telescope with large 100mm aperture objective lenses provides bright wide-field views rich in contrast, depth, and detail Accepts most 1 25" interchangeable eyepieces so you can view at different magnifications (requires two eyepieces of the same focal length) Includes two eyepieces that provide 22x magnification through the big binocular-telescope