Product information Objective lens diameter: 70mm Eyepiece: 6mm, 20mm Exit pupil diameter: 2.2mm Focal length: 400mm Barov Extender: 1.5x, 3x Finderscope: 5x24 Coating: FMC ultra-broadband multi-layer green film Zenith mirror: 90 positive image Zenith mirror Observation range: lunar sea/crater/star/Jupiter/viewing/etc. The 70mm large-aperture optical lens group has a fully transparent coating, with a high light transmission rate and a sharp and transparent image. An entry-level astronomical telescope suitable for beginners, cultivate children's interest in exploring the starry sky, let them experience the mysteries of the big sky, and make children and you become close friends with unique gifts. Multi-layer broadband coating increases the light transmittance and the image is sharp and clear. The optical lens group is fully transparent with coating, and the light transmission rate is high. 90 humanized design, the full upright zenith mirror is designed for your comfortable viewing.