Brand: Sky-Watcher

Sky-Watcher Skymax 90 (S11500)

050234115001

Brand: Sky-Watcher

Sky-Watcher Skymax 90 (S11500)

050234115001

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.
  • 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
Special Order
$270.00 USD

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How do I Special Order?
Special Order
$270.00 USD

Easy Payment Options with .

How do I Special Order?
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Product Description

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.

What can I see with a Sky-Watcher Skymax 90 (S11500)?

Here are some simulated views of common objects. Results with your telescope will vary with viewing conditions, obrits, equipment and more.

Jupiter with

25mm Eyepiece - 50x Magnification

(Included with This Telescope)

Jupiter with

10mm Eyepiece - 125x Magnification

(Included with This Telescope)

Jupiter with

5mm Eyepiece - 250x Magnification

Sold Separately

Moon with 25mm Eyepiece

50x Magnification

(Included with This Telescope)

Moon with 10mm Eyepiece

125x Magnification

(Included with This Telescope)

Moon with 5mm Eyepiece

250x Magnification

Sold Separately

Andromeda with 36mm Eyepiece

35x Magnification

Sold Separately

Andromeda with 25mm Eyepiece

50x Magnification

(Included with This Telescope)

Andromeda with 10mm Eyepiece

125x Magnification

(Included with This Telescope)

What's in the Box

  • Optical Tube Assembly
  • Two 1.25-inch eyepieces
  • Red dot finder
  • 1.25-inch diagonal
  • ¼-20 mounting plate
  • 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) 3.6
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

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