From $699.99
2 stores
The Explore Scientific FirstLight 102mm Doublet Refractor is a beginner-friendly refractor telescope designed for lunar, planetary, and bright deep-sky object observation. With a 102mm aperture and 1000mm focal length (f/9.8), the air-spaced doublet optics deliver sharp, high-contrast views with fully multi-coated lenses that minimize chromatic aberration and light loss. The included Twilight I Alt/Az mount provides intuitive manual control with dual-axis slow-motion tracking cables, complemented by a complete accessory package featuring a 25mm Plössl eyepiece, 2" 90° diagonal, red dot finder, and smartphone adapter for easy astrophotography capture.
| Optical design | Achromatic Doublet Refractor |
| Included Eyepiece | 25mm Plössl |
| Finder Scope | Red Dot |
| Maximum Magnification | 175 |
| Diagonal Type | 90° Star Diagonal |
| Focuser Type | Hexagonal Rack-and-Pinion |
| Focal ratio | f/9.8 |
| Diagonal | 2 |
| Tripod Height Range | 38.5 in |
| Aperture | 102 mm |
| Lens Coatings | Fully Multi-Coated |
| Mount type | Twilight I Alt/Az |
| Smartphone Adapter | ✓ |
| Focal length | 1000 mm |
| Focuser Size | 2.5 in |
| Mount Operation | Manual |
Explore Scientific
$379.99