Sky Watcher 90mm Maksutov-Cassegrain Telescope
Availability: Item has been discontinued by the manufacturer
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- 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
- 90mm aperture, 1250mm focal length, f/13.8 focal ratio
- Aluminum tube coated with glossy, black diamond metal-flake finish
- Included accessories: two 1.25-inch eyepieces, red dot finder, 1.25-inch diagonal, ¼-20 mounting plate, and a soft carrying case
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 90mm # S11500 includes two 1.25-inch eyepieces, red dot finder, 1.25-inch diagonal, ¼-20 mounting plate, and a soft carrying case.
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
- Primary Aperture (mm): 90
- F/Ratio: 13.9
- Focal Length (mm): 1250
- Secondary Diameter: 29mm
- Secondary Obstruction (by diameter): 32%
- Secondary Obstruction by Area: 10%
Observational Info:
- Dawes Limit: 1.29
- Rayleigh Limit: 1.55
- Limiting Mag.: 12.3
- Minimum Magnification: 13
- Maximum Magnification: 177
- Light Gathering (compared to next size down): 27%
General Info:
- Focuser: Primary Mirror
- OTA Length (Retract/Ext.): 11"
- OTA Outer Diameter: 4.125"
- OTA Weight (with accessories): 3.6lbs
Accessories:
- Included Finder: Red Dot
- Included Diagonal: 1.25" Star Diagonal
- Mounting Accessories: 1/4-20" Foot
- Included Eyepieces: 25/10 Wide Angle
- Magnification w/ Included Eyepieces: 50x/125x
- Included Case: Yes
- Corrector: No
| Manufacturer | Sky Watcher |
|---|---|
| Product Banner Type | discontinued |
| Free Shipping Graphic | Free Contiguous US Shipping |
| Telescope Focal Length | 1001 - 1250mm |
| Hide Found a better Shipped Price on Frontend? | No |
- 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
- 90mm aperture, 1250mm focal length, f/13.8 focal ratio
- Aluminum tube coated with glossy, black diamond metal-flake finish
- Included accessories: two 1.25-inch eyepieces, red dot finder, 1.25-inch diagonal, ¼-20 mounting plate, and a soft carrying case
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 90mm # S11500 includes two 1.25-inch eyepieces, red dot finder, 1.25-inch diagonal, ¼-20 mounting plate, and a soft carrying case.
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
- Primary Aperture (mm): 90
- F/Ratio: 13.9
- Focal Length (mm): 1250
- Secondary Diameter: 29mm
- Secondary Obstruction (by diameter): 32%
- Secondary Obstruction by Area: 10%
Observational Info:
- Dawes Limit: 1.29
- Rayleigh Limit: 1.55
- Limiting Mag.: 12.3
- Minimum Magnification: 13
- Maximum Magnification: 177
- Light Gathering (compared to next size down): 27%
General Info:
- Focuser: Primary Mirror
- OTA Length (Retract/Ext.): 11"
- OTA Outer Diameter: 4.125"
- OTA Weight (with accessories): 3.6lbs
Accessories:
- Included Finder: Red Dot
- Included Diagonal: 1.25" Star Diagonal
- Mounting Accessories: 1/4-20" Foot
- Included Eyepieces: 25/10 Wide Angle
- Magnification w/ Included Eyepieces: 50x/125x
- Included Case: Yes
- Corrector: No
| Manufacturer | Sky Watcher |
|---|---|
| Product Banner Type | discontinued |
| Free Shipping Graphic | Free Contiguous US Shipping |
| Telescope Focal Length | 1001 - 1250mm |
| Hide Found a better Shipped Price on Frontend? | No |