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Explore Scientific  |  SKU: FL-AR1021000

Explore FirstLight 102mm f/9.8 Doublet Refractor Telescope (OTA only)


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Explore FirstLight 102mm f/9.8 Doublet Refractor Telescope (OTA only)


  • 102mm / 4" Refractor OTA ideal for getting excellent deep sky views
  • Doublet design uses a pairing of glass lenses separated by a cushion of air to minimize chromatic aberrations
  • 1000 Focal Length, f/9.8 Focal Ratio
  • Anti-Reflection Multi-Coated Optics
  • 2.5" Hexagonal Focuser
  • 25mm Eyepiece, 90° Star Diagonal for more comfortable viewing
  • Red-Dot Finderscope to aid object location
  • Included adapter helps observers use their smart device to capture and share images
  • OTA Only: Mount and Tripod Required


Explore the Cosmos with the FirstLight 102mm f/9.8 Refractor Telescope – Your Gateway to the Universe

Unlock the mysteries of the night sky with the FirstLight 102mm f/9.8 Refractor Telescope, an ideal choice for astronomy enthusiasts of all levels. Whether you're captivated by the craters of the Moon, the majestic rings of Saturn, or the awe-inspiring spectacle of meteor showers, this telescope brings the universe closer to you. Dive into the depths of space to observe bright deep-sky objects with unparalleled clarity.

Designed for Beginners, Built for the Curious

The FirstLight AR102mm White Tube Refractor is not just another telescope; it's a beginner-friendly gateway to the cosmos. Featuring a robust 1000mm focal length at f/9.8, it comes equipped with high-quality, fully multi-coated lenses. These lenses boast anti-reflection coatings that ensure brighter, clearer images and true-to-life colors, making every celestial observation a memorable one.

Innovative Features for an Immersive Stargazing Experience

  • 2.5" Hexagonal Focuser: Fine-tune your celestial viewing with precision, ensuring sharp images of the stars and planets.
  • 2" 90° Diagonal: Experience comfortable viewing angles that make nighttime observations easier and more enjoyable.
  • Plossl 25mm Eyepiece: Delve into the cosmos with enhanced magnification, bringing distant celestial bodies into clear focus.
  • Red-dot Finder: Quickly locate celestial objects with ease, making your stargazing sessions more productive.

Capture and Share the Wonders of the Universe

In today's digital age, sharing your astronomical discoveries has never been easier. This telescope package includes a Smartphone Camera Adapter, transforming your stargazing experience. Now, capturing breathtaking photos of celestial events and sharing them with friends and family is as simple as attaching your smartphone to the eyepiece.

Embark on a Journey of Discovery

With the FirstLight 102mm f/9.8 Refractor Telescope, all you need to bring is your curiosity and a desire to explore the cosmos. From the moment you gaze through the eyepiece, you'll embark on an astronomical journey that captivates and inspires.

Choose a package including mount and tripod: 102mm f/9.8 with Alt-Azimuth Mount | 102mm f/9.8 with Equatorial Mount

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Explore FirstLight 102mm f/9.8 Doublet Refractor Telescope (OTA only) | FL-AR1021000 | 811803033399

Explore FirstLight 102mm f/9.8 Doublet Refractor Telescope (OTA only)





102 mm | 4"

Focal Length

1000 mm

Focal Ratio


Field of View



Fully multi-coated

Barrel Size





Package: 17.55 lb
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