Professional Monocular Space Astronomical Telescope with Portable Tripod for Children Description: This telescope is equipped with two different magnification eyepieces, 1.5X erecting eyepiece and 3X barlow lens, so that you can freely mix and adjust the magnification an max magnification up to 150X, convenient for you to observe different distances and sizes objects. Suitable for beginners astronomy enthusiasts, especially a best gift for your children as a great way to open up the wonders of the universe to the aspiring astronomer.  Features: Multiple interchangeable eyepieces with 1.5X erecting eyepiece and 3X barlow lens for increased viewing capability. 150X maximum magnification brings the distant scenery to your eyes. Easy to assembly with no tools required. With a tripod to hold telescope, very convenient for you to observe the objects. Aluminum alloy construction, lightweight and portable, good choice for beginning astronomer, especially a best gift for your children. Specification:  Condition: and High Qulity Material: Aluminum Alloy + Plastic Color: Black + Silver  Focal Length: 300mm. f/4 Aperture: 70 mm / 2.75 inch Eyepiece Lens: H6mm, H20mm Oblique Mirror: 90° Barlow Lens Magnification: 3X Erecting Eyepiece Magnification: 1.5X Magnification: 150X, 75X, 22.5X, 45X, 50X, 15X Suit for: Children Max Tripod Height: Approx. 38 cm / 14.96 inch Weight: Approx. 1602 g Packing List: 1 x Telescope Main Tube 1 x H6mm Eyepiece 1 x H20mm Eyepiece 1 x 3X Barlow Lens 1 x 1.5X Erecting Eyepiece 1 x Tripod 1 x Right Angle Lens 1 x Adjustable Lever 1 x Moon Lens About Configuration:  - Moon Filter: Because there is a lot of reflected light interfering our observation of full moon, so we can use the moon filter to avoid the interference, and then the moon's surface  will be seen more clearly.  - Please screw the moon filter into the threaded of eyepiece lens' lower part, and then connect the eyepiece lens with zenith lens.  About Multiples:  - Equipped with eyepiece: H6mm, H20mm, multiples are 300/6 = 50X, 300/20 = 15X  - If choose 3X Barlow lens together, multiples are 50 x 3 = 150X, 15 x 3 = 45X  - Plus 1.5X erecting eyepiece again, multiples are 50 x 1.5 = 75X, 15 x 1.5 = 22.5X  The formula:  - Objective lens focal length / eyepiece focal length x Barlow multiplier = maximum magnification  - Objective lens focal length / eyepiece focal length = magnification  Installation sequence:  1. Put up tripod, then attach the lens tube.  2. After the tube is fixed, install the finderscope (for preliminary search of the target object), then install the eyepiece (choose one from the two).  3. After find out the big goal, then debug with different eyepieces.  Note:  1. Multiples of course are not the only, and it depends on the combination of factors aperture and focal length. (For example, if the window is big, the natural light is good, and the view is clear.)  2. When use 3X Barlow lens, installed Barlow lens first, and then install the eyepiece. ( When install the Barlow lens, we need to move out the lid on the installation device of eyepiece.)  3. Please note that the new type and old type of this product will be sent randomly, and make sure you will not mind before ordering.