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Jeahar 300X 90mm High Magnification Astronomical Telescopes


Are you an astronomy enthusiast? Do you need a great refraction telescope? The high magnification astronomical telescope can help you. We highly recommend this astronomical telescope.A telescope is an instrument that aids in the observation of r...
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USD$ 407.38
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Price USD$ 203.54USD$ 193.89USD$ 184.24USD$ 171.38
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  • Magnification: 300X
  • Objective Len Diameter: 9cm/3.5in
  • Focal Length: 90cm/35.4in
  • Sighting Telescope: 5 x 2.4cm/0.9in
  • Inclined Mirror: 90°
  • Len: 360° Rotatable
  • Eyepiece: K0.9cm/0.4in, K2.5cm/1.0in
  • Tripod Height: 135cm/53.1in


  • The astronomical telescope comes with the tripod that can be mounted to the tripod for hands-free viewing
  • The astronomical telescope with 166X high magnification lens makes the view more clearly
  • Astronomical optical telescope is very convenient for outdoor use
  • This refraction telescope is easy to install and don't need any auxiliary tools 
  • Advanced optical lens coating plated, excellent eye protection and credit to the role
  • Using the most advanced technology, astronomical telescope is easy to carry
  • 166X telescope built-in wide ultra-clear as a mirror, so that your viewing angle greater


 Jeahar 300X 90mm High Magnification Astronomical Telescopes

  • Advanced optical lens coating plated, excellent eye protection and credit to the role

Jeahar 300X 90mm High Magnification Astronomical Telescopes

  •  The tripod offers you a great convenience that can help you for hands-free viewing

Jeahar 300X 90mm High Magnification Astronomical Telescopes

  • Astronomical telescope with skillful manufacture will  make your vision clear

Jeahar 300X 90mm High Magnification Astronomical Telescopes

  • Astronomical Telescope with super ultra-large aperture is convenience for you to observe

Jeahar 300X 90mm High Magnification Astronomical Telescopes

  • The view effect of the practical telescope is clear and wonderful 

Jeahar 300X 90mm High Magnification Astronomical Telescopes

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  • This 300X astronomical telescope is small and it is easy to carry outdoors

How to Use a Refracting Telescope:

Jeahar 300X 90mm High Magnification Astronomical Telescopes

Refracting telescopes employ glass lenses arranged in a metal tube to gather light from distant objects, such as the moon, planets, star clusters and nebulae. When used in combination with interchangeable magnifying eyepieces, a refracting telescope lets you study these astronomical objects in extraordinary detail. Refractors offer improved optical clarity when compared with reflector telescopes, which use mirrors instead of glass lens. Learn to operate your refracting telescope correctly to take advantage of its superior optical capabilities


  • Pick an observing site far from light sources. Porch lights, street lights and other sources of light pollution brighten the night sky, making faint objects difficult to observe
  • Lay the tripod on the ground. Extend each tripod leg to the same length, and then tighten the thumbscrews on each leg to secure it in place. Stand the tripod upright. Loosen the thumbscrews on the tripod's mounting bracket. Insert the telescope into the tripod's mounting bracket, and then tighten the retaining screws
  • Loosen the thumbscrew on the telescope's finder scope mount. Insert the finder scope into the mount, and tighten the retaining screw
  • Aim the telescope at an astronomical target. Pick a bright object, such as the moon or a star. Raise or lower the tube, and move it from side to side to point the telescope in the target's general direction
  • Look through the finder scope. Adjust the orientation of the telescope to center the object in the finder scope
  • Insert a low-power eyepiece -- one with 75X or lower magnification -- into the telescope's focuser. Tighten the retaining screw to secure it in place. Look through the eyepiece and verify that the object is in the field of view. If not, look through the finder scope and re-center the object. Adjust the focuser knob until the object appears sharp in the eyepiece
  • Insert a high-power eyepiece -- one with greater than 75X magnification -- into the telescope's focuser to study the object in greater detail. Adjust the focuser to sharpen the object in the eyepiece

Tips & Warnings:

  • Consult the telescope's user manual to determine its focal length. Knowing the focal length lets you determine what magnification an eyepiece will provide when used with the telescope. Divide the focal length of the telescope by the focal length of the eyepiece to calculate the resulting magnification. A 600mm telescope, for example, provides 60X magnification when used with a 10mm eyepiece
  • Observing the sun through a telescope will seriously damage your vision

How Are Telescopes Made?

Jeahar 300X 90mm High Magnification Astronomical Telescopes

Optical Telescopes:

  • Optical telescopes use a series of lenses or a curved mirror to focus visible light. Optical telescopes that only use lenses are called refracting telescopes. Optical telescopes that use a mirror are known as reflecting telescopes. They are usually more powerful than a simple lens telescope

Lenses and Mirrors:

  • Since light passes through the lenses of a telescope, the glass has to be free of impurities. This quality of glass is known as optical glass. Optical glass is coated to improve its performance and to make it less reflective. Mirrors that refract the glass don't have to be as pure

Assembly, Calibration and Testing:

  • Once the glass and mirrors are created, the lenses are also tested to ensure that the glass has been ground correctly. To do this, telescope makers measure the lens against a lens that is known to be perfect. Once the lenses pass inspection, they are assembled in a tube-like telescope housing. Then they are calibrated for clarity

Package Included:

  • 1 x Astronomical Telescope