Orion 10" f/8 Ritchey Chretien Reflecting OTA Telescope
ITEM #
OR-08266
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Orion 10" f/8 Ritchey Chretien Reflecting OTA Telescope
- 10-Inch (250 mm) aperture, f/8 Ritchey Chretien optical tube optimized for astrophotographic use with APS-C and full-frame (35 mm) CCD cameras and DSLRs
- Features a big 3.3-Inch rotatable dual-speed (10:1) Crayford focuser equipped with a sturdy linear-bearing to provide fine focus adjustment without slippage or flexure with heavy imaging accessories attached
- Hyperbolic primary and secondary mirrors made of low-expansion quartz glass with enhanced aluminum coatings boast 96% reflectivity for bright imaging performance, and the secondary mirror is precisely center-marked to aid in collimation
- Features two dovetail finder scope bases and a unique, Orion-exclusive slotted wide-format dovetail bar along the top of the telescope for easy attachment of imaging accessories
- Three built-in 1.5-Inch cooling fans accelerate cooling of the primary mirror to reach thermal equilibrium quickly
SPECIFICATIONS
| Aperture | 250 mm (9.75") |
|---|---|
| Dawes Limit | 0.46 arcseconds |
| Focal Length | 2000 mm |
| Focal Ratio | f/8 |
| Highest Magnification | 500x |
| Light Gathering Power | 1276x |
| Limiting Magnitude | 15.7 |
| Optical Design | Ritchey Chretien |
| Tube Length | 721mm |
| Tube Weight | 35.3 lbs |