Product Size:<br />Objective lens diameter: 70mm  2.45 "<br />Focal Length: 300mm.f / 4<br />The most highly: 38cm<br />Oblique mirror: 90 degree<br /><br /><br />Standard 0.965 inches attachment contains:<br />Eyepiece: H6mm， H20mm， 3X Barlow<br />15X and 50X can be set， add 3 x barlow can group 45X， 150X.<br />Stem on visual throughout the magnitude 11.23， etc<br />Stem on theoretical resolution: 2.000 Angle seconds This is equivalent to can see 1000 meters apart 0.970 centimeters of two objects..<br />Painted light force: 0.233<br />main lens cone color: silver grey<br />maximum magnification: 150X (lens focal length / eyepiece focal length times Barlow ratio = maximum magnification)