Orion Premium 102mm F/7 ED Refractor
The 102ED is an outstanding astro-imaging scope at an affordable price
The premium 102mm ED has a 714mm focal length and a moderatley fast focal ratio of f/7.0
Fully multicoated objective lens has one element made of ED glass for excellent color correction
The machined aluminum 2" Crayford-style focuser provides ultra-smooth dual speed focusing
Everything about this refractor says quality. Its fully multicoated, air-spaced 102mm doublet objective has one element made from superior extra-low dispersion (ED) optical glass for amazing clarity and excellent color correction. Your photos will show the difference!
It's loaded with features to transform your imaging and observing. All-aluminum construction will deliver decades of reliable performance. A sturdy 2" Crayford-style focuser handles heavy cameras or 1.25" accessories (with the adapter) and rotates for exact camera positioning. All-metal retractable lens shade, tube rings, and objective cover. It even has an engraved millimeter scale on the focuser drawtube for added precision!
Specifications:
| Optical design | Refractor |
| Optical diameter | 102mm |
| Focal length | 714mm |
| Focal ratio | 7.0 |
| Optics type | Air-spaced doublet |
| Glass material | Extra low dispersion |
| Eyepieces included | None |
| Resolving power | 1.14arc*sec |
| Lowest useful magnification | 15x |
| Highest useful magnification | 143x |
| Limiting stellar magnitude | 12.7 |
| Optical quality | Diffraction limited |
| Finder scope | None |
| Focuser | 2" Crayford |
| Mount style | Optical Tube without Mount |
| Astro-imaging capability | Lunar, planetary & long exposure |
| Tube material | Aluminum |
| Length of optical tube | 23.0 in. |
| Weight, optical tube | 8.1 lbs. |
| Additional included accessories | tube rings (114mm ID) included (2 rings), Dovetail mounting plate: 8", 1.25" eyepiece adapter, dovet |
| Other features | Dual-speed (11:1) focuser, Extendable lens shade, Rotatable focuser |
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