Explore Scientific


Explore Scientific FirstLight 102 mm Refractor with Twilight Adjustable Alt-Azimuth Mount

Built for the up-and-coming astronomer, the Explore Scientific FirstLight 102 mm Refractor Telescope offers a complete observation rig for viewing the Moon, planets, meteor showers, and bright deep-sky objects.

To produce a brighter and clearer image with more accurate colors the lenses are fully multi-coated with anti-reflection coatings.

The scope features a manual alt-azimuth mount with dual-axis control cables that allow users to track objects as they move across the night sky.


  • 2.5" hexagonal rack-and-pinion focuser drawtube is capable of holding heavier imaging rigs without flexing
  • 2" eyepiece holder on the drawtube allows the use of larger eyepieces, and allows the exiting light to completely cover larger imaging sensors
  • Manual alt-azimuth single-arm fork mount
  • Dual-axis slow motion tracking cables

Accessories Included

  • 1.25" 25mm eyepiece yields 40x magnification
  • 2" 90° diagonal places head in comfortable viewing position when aimed at or near the zenith
  • Reducer adapters for drawtube allows use of smaller eyepieces and accessories
  • 2"-to-1.25" reducer adapter allows the use of the included eyepiece plus a wide array of other optional eyepieces and accessories
  • Universal smartphone adapter attaches over eyepiece for astrophotography
  • Unmagnified red-dot finderscope allows for fast subject acquisition and star-hopping techniques
Type Achromat
Focal Lenght 1000mm
Focal Ratio f/9.8
Optical Diameter 102mm
Lens Coatings Fully Multi Coated
Adapter 2.5" Hexagonal Focuser; 2" 90° Diagonal, Smartphone Adapter
Eyepiece 25mm Plössl
Mount type Twilight 1
Mount Alt-Azimuth