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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


With the FirstLight 102mm f/9.8 Refractor Telescope you can view the Moon, planets, meteor showers, and bright deep sky objects.

This OTA is great for beginners and features fully multi-coated optics with anti-reflection coatings to produce brighter and clearer images with more accurate colors.

As an added benefit, this package includes an adapter that allows you to use your smartphone to easily capture and share the beauty unfolding in your eyepiece. With Firstlight, the only thing you need to provide is a desire to discover.

FirstLight AR102mm White Tube Refractor with 1000mm focal length f/9.8 telescope with fully multi-coated lenses; 2.5" Hexagonal Focuser; 2" 90° Diagonal; Plossl 25mm eyepiece; and Red-dot Finder; Smartphone Camera adapter. 


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) 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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