National Geographic Automatic 90/1250 Telescope
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National Geographic Automatic 90/1250 Telescope

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National Geographic Automatic 90/1250 Telescope Product description

  1. Automated GoTo Mount: The National Geographic Automatic 90/1250 Telescope features an integrated altazimuth GoTo mount that automatically locates and tracks over 270,000 celestial objects. This ease of use makes it perfect for novice astronomers eager to explore the night sky without manual star-hopping.

  2. Maksutov-Cassegrain Optics: This telescope employs a Maksutov-Cassegrain optical design, a catadioptric type that uses both mirrors and lenses to achieve a long focal length in a compact tube. This design is highly celebrated for delivering sharp, high-contrast images with minimal chromatic aberration, making it excellent for detailed views of the Moon, planets, and double stars.

  3. High Magnification Potential: With a substantial 1250mm focal length paired with its 90mm aperture, this telescope offers significant magnification capabilities. It allows observers to zoom in on intricate lunar craters, the planetary rings of Saturn, and Jupiter's prominent moons, bringing distant celestial bodies into impressive view.

  4. Robust Construction: Built for stability and durability, the telescope rests on a sturdy steel tube tripod. Its optical tube is typically constructed from high-quality aluminum, ensuring longevity and consistent performance across various observing sessions. This rigid design minimizes vibrations, providing a more enjoyable viewing experience.

<h2>ABOUT THE NATIONAL GEOGRAPHIC AUTOMATIC 90/1250 TELESCOPE</h2>

<p>The National Geographic Automatic 90/1250 Telescope stands out within its series due to its advanced GoTo computer control system, making it exceptionally user-friendly for beginners and those seeking quick setup and automated celestial navigation. Unlike manual telescopes, this model automatically pinpoints and tracks thousands of celestial objects, eliminating the need for complex manual alignment. This Maksutov-Cassegrain telescope, a type of catadioptric (mirror-lens) telescope, offers excellent optical performance. Its compact design belies a powerful 90mm aperture and a long 1250mm focal length, providing crisp, high-contrast images ideal for viewing the Moon, planets, and brighter deep-sky objects. Constructed from durable materials such as high-quality aluminum for the optical tube and robust steel for the tripod, it ensures stability and longevity. This telescope is particularly well-suited for backyard astronomy, educational purposes, and anyone who desires an intuitive and highly capable instrument for exploring the cosmos.</p>

<h2>ABOUT NATIONAL GEOGRAPHIC</h2>

<p>National Geographic is synonymous with exploration and discovery, a legacy upheld by its optical instruments. For over a century, the National Geographic Society, founded in the USA in 1888, has been dedicated to inspiring people to care about the planet. Their telescopes, like the Automatic 90/1250, reflect a philosophy of making the wonders of the universe accessible to everyone. The brand partners with reputable manufacturers to create products that combine ease of use, educational value, and reliable performance. National Geographic is known for its commitment to quality and providing tools that foster a deeper understanding and appreciation of our world and beyond.</p>

<h2>MAIN FEATURES</h2>

  • Optical Design: Maksutov-Cassegrain (catadioptric) telescope

  • Aperture: 90 mm

  • Focal Length: 1250 mm

  • Focal Ratio: f/13.9

  • Mount: Single-arm GoTo altazimuth mount

  • Drive: Integrated tracking motor for automated sky object tracking

  • Eyepieces: Two 1.25" Kellner eyepieces (K-25mm and K-12.5mm) for varying magnification

  • Finderscope: LED red-dot finderscope for easy object alignment

  • Tripod: Robust steel tube tripod for enhanced stability

  • Compatibility: Standard 1.25" eyepiece acceptance for wide accessory compatibility

  • Software: Includes astronomy software for celestial navigation and learning

  • Intended Use: Ideal for beginners and intermediate observers for lunar, planetary, and bright deep-sky object viewing

<h2>WARRANTY</h2>

<p>This product is covered by a 5-year global warranty that includes defects in materials and manufacturing under normal use.</p>

<h2>IN THE BOX</h2>

  • National Geographic Automatic 90/1250 Telescope

  • Single-arm GoTo altazimuth mount

  • Steel tube tripod

  • K-25mm (1.25") Kellner eyepiece

  • K-12.5mm (1.25") Kellner eyepiece

  • LED red-dot finderscope

  • Built-in compass

  • Moon filter

  • Astronomy software

  • Star map

  • Instruction manual

General properties

Manufacturer National Geographic
Telescope series National Geographic Catadioptrics
Made in -
Warranty 5 years
SKU 9062100

Optical properties

Optical design Catadioptric telescope
Lowest useful magnification. 12.80 x
Highest useful magnification. 180.00 x
Aperture. 90.00 mm
Focal length. 1250.00 mm
Focal ratio. €13.80
Focal Length of Eyepiece 1 25
Magnification of Eyepiece 1 50
Focal Length of Eyepiece 2 12.5
Magnification of Eyepiece 2 100
Light gathering power. 165.30 x
Limitting stellar magnitude. €99.70
Resolution Rayleigh. 1.50 Arc seconds
Resolution Dawes. 1.20 Arc seconds

Recording properties

Image Capture -
Photo adapter -

Mounting properties

Mount type of build Azimuthal
Tripod adaptable Yes
Tripod type -
Tripod material Heavy-Duty Stainless Steel

Navigation properties

GoTo Control Yes
GoTo Language English, French, German, Italian, Spanish
GoTo control interfaces -
Alignment method -
GPS No
Tracking Yes
Tracking rates Lunar
Tracking Modes Alt-Az
Slow motion controls -
Slew Speed -
Communication Ports Hand control
Computer hand control -

Physical properties

Power Supply AA
Lens coating Fully Multicoated
Eyepiece barrel diameter 1.25'' / 31.75 mm
Eyepiece angle 90°
Total kit weight. 6.00 kg
Color Grey / Brown

Special features

Finderscope Red Dot
Recommended for Beginners
Suitable for observing Moon, Planets

Most common questions (Q&A)

Need help? Not sure about something? Don't hesitate - ask our community! Our experienced community is here to help you with this question.

Hi Can I ask you a question.Do you have a manual for the telescope national geographic 90 1250 in greek

by maria

Dear Sir/Madam,

thank you for contacting us.

We kindly apologize for the late reply, which is a result of the increased demand for our services.

Unfortunately, the manual for this telescope is sadly not available in the Greek language.

Should you require any further assistance, please do not hesitate to contact us again.

Kind Regards,

by Optics Trade team

Considering Nat Geo 90x1250 Automatic Telescope. Saw comments about 12v Power Supply and Zoom Eyepiece. Want info and price on these as well any other accessories you would suggest.

by Bill

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