Monocular Professional Space Astronomical Telescope Optical with Tripod

Aperture: 70mm (2.4 inch); Focal Length: 300mm f/4; Oblique Mirror: 90 degrees; Warp / Weft Machine and Aluminum Tripod; The Most Highly: 38cm Standard 0.965 inch attachment contains:Eyepiece: H6mm, H20mm; 3X the Barlow lens; 1.5X positive lens The formula: Objective lens focal length / eyepiece focal length x Barlow multiplier = maximum magnification The formula: Objective lens focal length / eyepiece focal length = magnification Please screw the moon filter into the threaded of eyepiece lens' lower part, and then connect the eyepiece lens with zenith lens