Specification: Light inlet ning: 40mm Focal length: 400mm Focus ratio: 7.2 Optical : refraction Extreme performance: 8.8 Basic type: desktop tripod Material: aluminum alloy tripod Height: 45 cm Corner mirror: 90mm Resolution: 1.99 mm Main mirror weight: 0.6 kg Length of the main mirror: 0.6 kg Gross weight: 1.8 kg Gathering strength: 68x Color: white/silver Display combination: 1.5 x upright lens + 18 mm eyepiece + viewfinder (upright full image) Usage rules: 1. Pull out the support feet, insert the Telescop Convenientopic tube into the fork frame and then tighten it with the large locking screw. 2. Insert the lens into the focusing tube and fasten it with the appropriate screws. 3. Attach the eyepiece and viewfinder to the main lens and secure them with the appropriate screws. 4. If you want to use a vertical lens for magnification, please install it between the eyepiece and the lens barrel so that you can see the celestial body (see manual for specific s). Package included: 1 x main pipe (17.7 ) 2 x eyepieces (27 mm/15 mm) 1 x Finder 1 x tripod 1 x 90 degree upright star diagonal 1 x English instruction manualFind answers in product info, Q&As, reviews