Details
- 10 inches of aperture gobble up delicate details of deep-sky objects
- Ritchey-Chretien optical design produces wonderfully flat, virtually coma-free images superior to those achievable with conventional reflector or Schmidt-Cassergain telescope designs
- Ideal for use with both medium and large-format CCD cameras and DSLRs; provides a wide, fully illuminated field and pinpoint star clarity out to the edge of the sensor
- Features a 3-inch rotatable, machined, dual-speed (10:1) linear-bearing Crayford focuser that provides fine focus adjustment without slippage or flexure with heavy accessories attached
- Designed with collimation in-mind, Orion RC's feature a precisely center-marked secondary mirror and include a Cheshire collimating tool, making them the most convenient RC's to collimate available
- Optical tube has nine computer-positioned internal light baffles to ensure maximum contrast; primary mirror tube is internally micro-baffled.
Go after even the most elusive and faint deep-sky targets with the Orion 10" f/8.0 Ritchey-Chretien Astrograph. Featuring virtually coma-free optics for superb imaging performance, the Orion 10" f/8.0 Ritchey-Chretien Astrograph boasts a plethora of deluxe features. Its precision hyperbolic primary and secondary mirrors are made of highest quality quartz optical glass with enhanced reflectivity (94-96%) aluminum coatings. The machined aluminum, dual-speed (10:1) 3" modified Crayford focuser with linear track bearing provides rigid, backlash-free support for hefty imaging accessories. Nine knife-edge computer-positioned internal light baffles in the optical tube, primary mirror tube baffles, and a baffled secondary mirror shield ensure maximum image contrast and brightness. Three 1.5" DC cooling fans built into the rear cell help to reduce cooldown time for the telescope to reach thermal equilibrium. Two wide "Losmandy-style" dovetail mounting plates are attached to both the top and bottom of the tube for easy mount attachment and use of optional guide scope for guided CCD imaging pursuits.
Product Specifications:
| Use | Astronomy and terrestrial |
| User level | Advanced |
| Optical design | Ritchey-Chretien |
| Optical diameter | 250mm |
| Focal length | 2000mm |
| Focal ratio | f/8.0 |
| Optics type | Hyperbolic |
| Resolving power | 0.46arc*sec |
| Lowest useful magnification | 36x |
| Highest useful magnification | 300x |
| Limiting stellar magnitude | 14.7 |
| Optical quality | Diffraction limited |
| Finder scope | None |
| Focuser | 3in. dual-speed linear bearing Crayford |
| Secondary mirror obstruction | 111mm |
| Secondary mirror obstruction by diameter | 44% |
| Mount style | Optical Tube without Mount |
| Astro-imaging capability | Lunar, planetary and long exposure |
| Tube material | Steel |
| Length of optical tube | 29.0 in. |
| Weight, optical tube | 34.5 lbs. |
| Additional included accessories | Two 1in. and one 2in. removable extension tubes, Orion collimation tool, Quartz primary and secondary mirrors |
| Other features | Baffles in OTA and micro baffles in light shield, Three 1.5in. DC colloing fans built into rear cell., Wide mounting plates on top and bottom of plate |
| Warranty | One year |
Additional Information
| Model | 8961 |
|---|---|
| Weight | 35.0000 |
