Explore Scientific AR102 Air-Spaced Doublet Refractor Telescope
$449.99
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A Lightweight 4-Inch Achromat Built for Outreach
This classic 102mm crown-and-flint air-spaced doublet refractor delivers stunning, high-contrast views at a fast f/6.5 focal ratio, offering excellent value for lunar, planetary, and double-star observation.
At just 11.5 lbs, the optical tube is light enough to carry to a star party in one trip, yet the 102mm aperture still pulls in plenty of light for bright, satisfying views.
The tube arrives with professional-grade components including a two-speed 2-inch Crayford focuser, a dielectric-coated 2-inch diagonal, and an 8x50 straight-through finderscope on a quick-release base.
Key Features
- 102mm Air-Spaced Doublet - crown-and-flint achromatic design for sharp, high-contrast views
- Fast f/6.5 Focal Ratio - compact, portable tube length at just 11.5 lbs
- 2-Inch Dual-Speed Focuser - smooth, precise focus control for visual and imaging use
- 99% Dielectric Diagonal - one-piece 2-inch diagonal for bright, high-contrast views
- Hybrid Finder Scope Base - 8x50 straight-through finderscope for quick target acquisition
- Vixen-Style Dovetail Cradle - 45mm wide V-block compatible with alt-azimuth or EQ mounts
| Specifications | |
|---|---|
| Optical Design | Air-Spaced Crown-and-Flint Doublet (Achromatic Refractor) |
| Aperture | 102mm (4 inches) |
| Focal Length | 663mm |
| Focal Ratio | f/6.5 |
| Limiting Magnitude | 12.5 |
| Resolution | 1.14 arcsec |
| Tube Length (with dew shield) | 25.5 in / 698mm |
| Mount Type | Cradle Ring with Vixen-Style Dovetail (OTA Only) |
| Included Accessories | 8x50 Finderscope, 2-Inch Diagonal, Mounting Rings, Finder Base |
| Model / SKU | DAR102065-02 |
| Weight | 11.5 lbs |
| Warranty | Limited warranty, activated with registration within 60 days of purchase |
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