90mm Large Aperture & Long Focal Length With 90mm aperture & 600mm focal length. Large aperture can collect more lights, making the image clearer & the visual range larger. A long focal length increases the magnification & allows you to see farther stars 24X to 300x Magnification Including 25mm, 10mm & 6mm eyepieces each, and also includes a 3x Barlow lens for magnification. The magnification is 24x to 300x. You can see more stars clearly Adjustable Altazimuth Mount The tripod can be adjusted 180° vertically & 360° horizontally, Its height is adjustable during 28-45inch, Make it easy to search for targets Read more Rich Accessories Optical tube Finderscope Cell phone holder Eyepiece 3 (25mm/10mm/6mm) Barlow lens Remote control Stainless Steel Tripod Portable bag Remote Control Photographing Installing the cell phone & holder on the astronomical telescope, Pictures taken by the remote control without shaking is very clear Red Dot Finderscope Use the corrected finderscope to search for the target at first, and then use the astronomical telescope to observe the stars & starry sky, which is easy to use & the method is also simple Read more Installation of Phone Holder Rotate the knob to adjust the width of the clip, Put the phone into the holder, then turn the knob to fix phone Align the small round hole of the holder with the phone camera, then tighten its knob to fix Put the lens of the eyepiece vertically into the circular groove, align the lens of the cell phone, and finally rotate the cover of the circular groove to fix it Install the eyepiece with holder to erector mirror or Barlow lens Installation of Optical Tube Take off the objective lens cover at the front end of the light pipe Push the copper-colored base of the optical tube into the tripod slot & lock it by screws Use steps of tripod Detach the legs of the tripod Place the tray on the stand in the center of the tripod, then rotate the tray until it fits into place Open the buckle to adjust the height & inclination of the tripod (function(f) {var _np=(window.P._namespace("AplusModule"));if(_np.guardFatal){_np.guardFatal(f)(_np);}else{f(_np);}}(function(P) { // register javascript with unique module id P.when("jQuery", "AplusModules-module-6", "ready").execute(function($, hoverModule) { hoverModule("aplus-module-6-3"); }); })); Install erecting mirror & Barlow lens Remove the covers on both ends of the erecting mirror Insert the chrome end of the erecting mirror into the optical tube Tighten the screws to fix the erecting mirror Then insert the Barlow lens into erecting mirror Install Eyepiece Insert the chrome end of the eyepiece into the erecting mirror or Barlow lens and tighten the screws to fix it. We recommend trying the 25mm eyepiece first When the focus is not correct, the image will be blurred. Please turn the focus knob to adjust the focus until the picture is clear Install Red Dot Finderscope Locate the mounting slot on the optical tube & loosen the screw Insert the finder & tighten the screws Remove the protective sheet inside the battery box Turn on the finder switch and calibrate (function(f) {var _np=(window.P._namespace("AplusModule"));if(_np.guardFatal){_np.guardFatal(f)(_np);}else{f(_np);}}(function(P) { // register javascript with unique module id P.when("jQuery", "AplusModules-module-6", "ready").execute(function($, hoverModule) { hoverModule("aplus-module-6-4"); }); }));