/astronomical suitable for indoor and outdoor 1. Mount the on a tripod, adjust the angle, remove the dust cover, and attach the eyepiece. 2. Align the finder scope with the object, make it in the center of the field of view. 3. Rotate the focus wheel slowly until see a bright, clear image. About Magnification: The focal length of the eyepiece, combined with the focal length of the , determine the magnification . To calculate the of your with any particular eyepiece, simply divide the focal length of the (300mm) by the focal length of the eyepiece (indicated in “mm” on the eyepiece collar). For example, when you use the eyepiece H20mm with this , the magnification will be 15X, and with a 3X Barlow lens, the magnification will be 45X. Specifications: Focal Length: 300mm Max Magnification: 150X Eyepiece: H6mm(50X), H20mm(15X) Package List: 1 * Main Tube 1 * H6mm Eyepiece 1 * H20mm Eyepiece 1 * 3X Barlow Lens 1 * Tripod