Telescope is a professional universal astronomical telescope for adults begginers and kids, it can be a good observation of planets and terrestrial objects, like moon, star clusters,birdwatching Observation step 1. Aim at the subject to be observed, adjust the appropriate height and initial angle, and be careful not to shake as much as possible. 2. The finder mirror is coaxial and parallel to the main lens barrel. Look at the finder mirror and adjust the up, down, left, and right angles through the tripod handle to find the position of the observation object. 3. Lock the observation object, watch the main tube eyepiece, and adjust the focus wheel to clear. Specification Product Name: Astronomical Telescope Material: ABS+metal Optical system: refraction Linear field of view: 61ft (19m) Caliber: 70mm Exit pupil diameter: 2.2mm Eyepiece 1: 10mm Resolution: ≦4.0 Magnification: 40X Eyepiece 2: 25mm Gathering power: 73.5X Magnification: 16X Zenith Mirror: 48° Erect Image Zenith Mirror Product weight: 2.1kg Packing List: Lens barrel*1