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URL: http://www.thaiexcite.com/Sky-Watcher-Skymax-180-Maksutov-Cassegrain-BKMAK180-OTA.html
กระบอกกล้องดูดาว Sky-Watcher Skymax 180 Maksutov-Cassegrain OTA
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กระบอกกล้องดูดาว Sky-Watcher Skymax 180 Maksutov-Cassegrain OTA
- Maksutov-Cassegrain optical design
- Primary and secondary mirrors feature proprietary Radiant Aluminum Quartz™ (RAQ™) coatings
- Corrector plate featuring Metallic High-Transmission Coatings (MHTC) virtually eliminates chromatic aberrations
- 180mm aperture, 2700mm focal length
- Aluminum tube coated with glossy, black diamond metal-flake finish
- Included accessories: a 2-inch 28mm eyepiece, a 9x50 finderscope, and a 2-inch diagonal
If you’re seeking crisp, contrasty views with high levels of detail, look no further than the Skymax series, Sky-Watcher’s premiere line of Maksutov-Cassegrains. Generally regarded as producing a sharper image than Schmidt-Cassegrains, Maksutovs offer astronomers a large visual aperture, high contrast and long focal length in a compact package. These telescopes deliver higher levels of planetary detail due to a focal length that is 5-7 times longer than your average Newtonian or refractor telescope.
Skymax Maksutovs feature mirrors constructed of borosilicate, polished and coated with our proprietary Radiant™ Aluminum Quartz™ (RAQ™) coatings, which produce a remarkable 94% reflectivity.
All Maksutovs use a corrector plate to help reduce chromatic aberration, which is then coated using our signature Metallic High-Transmission Coatings™ (MHTC™), producing professional grade optics at an affordable price.
The Skymax 180 includes a 2-inch 28mm eyepiece, a 9x50 finderscope, V-style dovetail, and a 2-inch diagonal.
SPECIFICATIONS
| Optical Info | |
|---|---|
| Optical Design | Mak-Cass |
| Mirror Coatings | Radiant Aluminum Quartz (RAQ)™ coatings with 94% reflectivity |
| Lens Coatings | Fully Multi-Coated |
| Glass Type | BK7/Borosilicate |
| True Aperture (mm) | 182 |
| Primary Aperture (mm) | 199 |
| F/Ratio | 15 |
| Focal Length (mm) | 2700 |
| Secondary Diameter | 41mm |
| Secondary Obstruction (by diameter) | 23% |
| Secondary Obstruction by Area | 5% |
| Observational Info | |
| Dawes Limit | 0.64 |
| Rayleigh Limit | 0.78 |
| Limiting Mag. | 13.8 |
| Minimum Magnification | 26 |
| Maximum Magnification | 354 |
| Light Gathering (compared to next size down) | 44% |
| General Info | |
| Focuser | Primary Mirror |
| OTA Length (Retract/Ext.) | 22" |
| OTA Outer Diameter | 8.625" |
| OTA Weight (with accessories) | 19 |
| Accessories | |
| Included Finder | 9x50 Finder |
| Included Diagonal | 2" Star Diagonal |
| Mounting Accessories | V-Rail |
| Included Eyepieces | 28 LET |
| Magnification w/ Included Eyepieces | 96.4x |
| Included Case | No |
| Corrector | No |
SUPPORT DOCUMENTS
Manuals:
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About Sky-Watcher
Sky-Watcher was launched in 1999 featuring a modest line of Newtonian and refractor optical tubes, with distribution in Europe and Asia. In 2000, Sky-Watcher released their first series of Dobsonian telescopes, and two years later answered the rising popularity of digital SLRs with their first version of the famed German Equatorial Mount, the EQ6. Today, with a full product line that includes Dobsonians, APO refractors, EQ mounts, and photography products, Sky-Watcher has grown into the most popular telescope brand worldwide.