4. Specifications
| Orion 8" f/3.9 Newtonian Astrograph | Orion 10" f/3.9 Newtonian Astrograph | ||
Optical configuration: | Newtonian reflector | Optical configuration: | Newtonian reflector |
Aperture: | 203mm | Aperture: | 254mm |
Focal length: | 800mm | Focal length: | 1000mm |
Focal ratio: | f/3.9 | Focal ratio: | f/3.9 |
Primary mirror: | Low thermal expansion optical glass, | Primary mirror: | Low thermal expansion optical glass, |
| parabolic figure |
| parabolic figure |
Mirror coatings: | Enhanced aluminum (94% | Mirror coatings: | Enhanced aluminum (94% |
| reflectivity) with SiO2 overcoat |
| reflectivity) with SiO2 overcoat |
Secondary mirror |
| Secondary |
|
minor axis: | 70mm | mirror minor axis: | 82mm |
Focuser: | Focuser: | ||
| accepts 2" accessories |
| accepts 2" accessories |
Drawtube travel: | 38mm | Drawtube travel: | 38mm |
Optical tube: | Rolled steel, gloss enamel exterior | Optical tube: | Rolled steel, gloss enamel exterior |
| finish |
| finish |
Tube baffles: | 9 | Tube baffles: | 13 |
Weight: | 17.5 lbs. – without tube rings, fan, | Weight: | 25.5 lbs. – without tube rings, fan, |
| finder scope, 1.25" eyepiece holder |
| finder scope, 1.25" eyepiece holder |
| 21.6 lbs. – with tube rings, finder |
| 30.2 lbs. – with tube rings, finder |
| scope, 1.25" eyepiece holder |
| scope, 1.25" eyepiece holder |
Length: | 30.25" | Length: | 38.6" |
Tube rings: | Included, hinged, | Tube rings: | Included, hinged, |
Finder Scope: | 9x50, with | Finder Scope: | 9x50, with |
| dovetail bracket |
| dovetail bracket |
2" Extension adapters: 30mm and 36mm extension length | 2" Extension adapters: 30mm and 36mm extension length | ||
One-Year Limited Warranty
The Orion 8" and 10" f/3.9 Newtonian Astrographs are warranted against defects in materials or workmanship for a period of one year from the date of purchase. This warranty is for the benefit of the original retail purchaser only. During this warranty period Orion Telescopes & Binoculars will repair or replace, at Orion’s option, any warranted instrument that proves to be defective, provided it is returned postage paid to: Orion Warranty Repair, 89 Hangar Way, Watsonville, CA 95076. Proof of purchase (such as a copy of the original receipt) is required.
This warranty does not apply if, in Orion’s judgment, the instrument has been abused, mishandled, or modified, nor does it apply to normal wear and tear. This warranty gives you specific legal rights, and you may also have other rights, which vary from state to state. For further warranty service information, contact: Orion Customer Service (800)
Orion Telescopes & Binoculars
OrionTelescopes.com
89 Hangar Way, Watsonville CA 95076
Customer Support Help Line (800) 676-1343
© 2011 Orion Telescopes & Binoculars
