National Geographic 70mm Refractor Telescope Adjustable Height Tripod Item Number 80-40071CF Embark on a fascinating adventure through our solar system and beyond with National Geographic’s 70mm telescope. This refractor features unique carbon fiber styling wrap that gives it a rugged edge and a 70mm aperture that will perform well in lunar, planetary and deep sky observing situations. Its manageable 700mm focal length makes it highly portable and results in a versatile f/10 focal ratio that offers both wide fields and high-powered views. For those looking to make their first foray into astrophotography, the scope also comes with an adapter that allows users to secure their smartphone to the eyepiece in order to capture and easily share images. Ample 70mm aperture will reveal lots of lunar details, planetary features like Jupiter’s cloud belts or Saturn’s rings and some of the brightest Messier objects.Two interchangeable Plössl eyepieces and a 2x Barlow lens provide magnifications ranging from 26.9x to 144x.Optical tube with carbon fiber look is lightweight and durable.Panhandle control on alt-azimuth mount allows for smooth movements when navigating the night sky.Full size tripod is fully adjustable and includes an accessory tray for holding extra eyepiece.Included adapter helps observers use their smart device to capture and share images.Use the red dot finder and downloadable astronomy software to locate observing targets. Includes everything you need to get started Two interchangeable Plössl eyepieces and a 2x Barlow lensSmart device adapter Diagonal Red Dot Viewfinder National Geographic StarApp70 - 70mm Refractor Telescope w/ Astronomy APP National Geographic RT70400 - 70mm Refractor Telescope with Panhandle Mount National Geographic StarApp114 - 114mm Reflector Telescope w/ Astronomy APP Explore FirstLight 80mm CF Telescope Go-To Tracker Combo with Solar Filter Explore One Titan 70mm Telescope with Panhandle Mount National Geographic NT114CF 114mm Reflector Telescope Add to Cart Buying Options Buying Options Add to Cart Buying Options Add to Cart Customer Reviews 4.5 out of 5 stars 2 3.7 out of 5 stars 55 2.4 out of 5 stars 4 — 1.0 out of 5 stars 1 4.0 out of 5 stars 30 Price $99.99$99.99 — no data — no data $499.99$499.99 — no data $99.99$99.99 Maximum Magnification 144x 40x 103x 125x 60x 102x Lens Size 70mm 70mm 114mm 80mm 70mm 114mm Focal Length 700mm 40mm 500mm 640mm 360mm no data Telescope Terms To Know: Diagonal: A mirror that deflects the ray of light 90 degrees. With a horizontal telescope tube, this device deflects the light upwards so that you can comfortably observe by looking downwards into the eyepiece. The image in a diagonal mirror appears upright but rotated around its vertical axis (mirror image). Focal length: Everything that magnifies an object via an optic lens has a certain focal length. The focal length is the length of the path the light travels from the surface of the lens to its focal point. The focal point is also referred to as the focus. In focus, the image is clear. In the case of a telescope, the focal length of the telescope tube and the eyepieces are used to determine magnification. Lens: The lens turns the light that falls on it around in such a way so that the light gives a clear image in the focal point after it has traveled a certain distance (focal length). Eyepiece: An eyepiece is a system made for your eye and comprised of one or more lenses. In an eyepiece, the clear image that is generated in the focal point of a lens is captured and magnified still more. Magnification: The magnification corresponds to the difference between observation with the naked eye and observation through a magnifying device like a telescope. If a telescope configuration has a magnification of 30x, then an object viewed through the telescope will appear 30 times larger than it would with the naked eye. To calculate the magnification of your telescope setup, divide the focal length of the telescope tube by the focal length of the eyepiece. Telescope Terms To Know: Diagonal: A mirror that deflects the ray of light 90 degrees. With a horizontal telescope tube, this device deflects the light upwards so that you can comfortably observe by looking downwards into the eyepiece. The image in a diagonal mirror appears upright but rotated around its vertical axis (mirror image). Focal length: Everything that magnifies an object via an optic lens has a certain focal length. The focal length is the length of the path the light travels from the surface of the lens to its focal point. The focal point is also referred to as the focus. In focus, the image is clear. In the case of a telescope, the focal length of the telescope tube and the eyepieces are used to determine magnification. Lens: The lens turns the light that falls on it around in such a way so that the light gives a clear image in the focal point after it has traveled a certain distance (focal length). Eyepiece: An eyepiece is a system made for your eye and comprised of one or more lenses. In an eyepiece, the clear image that is generated in the focal point of a lens is captured and magnified still more. Magnification: The magnification corresponds to the difference between observation with the naked eye and observation through a magnifying device like a telescope. If a telescope configuration has a magnification of 30x, then an object viewed through the telescope will appear 30 times larger than it would with the naked eye. To calculate the magnification of your telescope setup, divide the focal length of the telescope tube by the focal length of the eyepiece. Using/Aligning the Red Dot Viewfinder: Insert the 26 mm eyepiece into the diagonal and power on the viewfinder by sliding the switch on its right side to an “On” position. • Point the eyepiece at an easy to identify target like a telephone pole that is approximately 200 yards away. Center the object in the eyepiece. Lock the telescope into place by tightening the panhandle. • Without moving the telescope, position the red dot using the two adjustment screws so that it shares the same view as the one in your eyepiece. The front screw will move the viewfinder up and down, and the other will move it side to side. Your viewfinder is now aligned. Note: To preserve battery life, don’t forget to turn off the viewfinder after use