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Skymax 90

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$270.00
SKU S11500
  • 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
  • Description
  • Specifications


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 90 includes two 1.25-inch eyepieces, red dot finder, 1.25-inch diagonal, ¼-20 mounting plate, and a soft carrying case.

 

SKUS11500
UPC050234115001
Optical Info
Optical DesignMak-Cass
Mirror CoatingsRadiant Aluminum Quartz (RAQ)™ coatings with 94% reflectivity
Lens CoatingsFully Multi-Coated
Glass TypeBK7/Borosilicate
Primary Aperture (mm)90
F/Ratio13.9
Focal Length (mm)1250
Secondary Diameter29mm
Secondary Obstruction (by diameter)32%
Secondary Obstruction by Area10%
Observational Info
Dawes Limit1.29
Rayleigh Limit1.55
Limiting Mag.12.3
Minimum Magnification13
Maximum Magnification177
Light Gathering (compared to next size down)27%
General Info
FocuserPrimary Mirror
OTA Length (Retract/Ext.)11"
OTA Outer Diameter4.125"
OTA Weight (with accessories)3.6
Accessories
Included FinderRed Dot
Included Diagonal1.25" Star Diagonal
Mounting Accessories1/4-20" Foot
Included Eyepieces25/10 Wide Angle
Magnification w/ Included Eyepieces50x/125x
Included CaseYes
CorrectorNo
Shipping Weights & Dimensions