ED102mm Essential Series Air-Spaced Triplet APO Refractor
Explore Scientific
From $699.99
2 stores
The Explore Scientific ED102 Essential Series is a premium true apochromatic air-spaced triplet refractor designed for both visual observation and serious astrophotography. Featuring a genuine Hoya FCD1 extra-low dispersion (ED) glass objective with proprietary EMD multi-layer coatings, it delivers razor-sharp, high-contrast views with virtually no chromatic aberration across lunar, planetary, and deep-sky targets. Its 102mm aperture and f/7 focal ratio strike an ideal balance between light-gathering power and portability, making it versatile for wide-field imaging and detailed solar system observation. The precision dual-speed 2-inch rack-and-pinion focuser with extension tubes ensures smooth, repeatable focusing suitable for imaging equipment.
Specifications
| Limiting Magnitude | 12.5 |
| Focuser Type | Dual-Speed 2 inch Rack-and-Pinion |
| ED Glass Type | Hoya FCD1 |
| Focal ratio | f/7 |
| Tube Length without Dew Shield | 603 mm |
| Dovetail Type | Vixen-Style |
| Diffraction Limited Performance | 0.25 PV |
| Focal length | 714 mm |
| Tube Length with Dew Shield | 774 mm |
| Diagonal Reflectivity | 99% |
| Aperture | 102 mm |
| Tube Diameter | 119 mm |
| Diagonal Size | 2 |
| Optical Coating | EMD Enhanced Multi-Layer |
| Resolution | 1.14″ |
| Weight | 5.4 lb |
| Optical design | Air-Spaced Triplet APO |