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Sky Watcher 90mm Maksutov-Cassegrain Telescope # S11500

Our Price: $255.00
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In stock (2 Available)
Ships by Next Business Day
Our Product ID: T-SW-S11500
Manufacturer SKU: S11500
Item Can Ship: To US Only
Sky Watcher 90mm Maksutov-Cassegrain Telescope # S11500

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  • Sky Watcher 90mm Maksutov-Cassegrain Telescope # S11500
  • Sky Watcher 90mm Maksutov-Cassegrain Telescope # S11500
  • Sky Watcher 90mm Maksutov-Cassegrain Telescope # S11500
  • Sky Watcher 90mm Maksutov-Cassegrain Telescope # S11500
  • Sky Watcher 90mm Maksutov-Cassegrain Telescope # S11500

Quick Overview

  • 90mm Maksutov-Cassegrain
  • 1250 mm (f/13.8)
  • Fully multi-coated
  • Red Dot finder
  • 1.25” 90 degree Star diagonal
  • 25mm and 10mm Plössl eyepieces
  • Black V-style dovetail plate

Product Details

The Sky-Watcher Maksutov-Cassegrains are the ultimate take-anywhere telescopes. Despite their small dimensions they pack a powerful punch. Their high-resolution, diffraction-limited optical systems are multi-coated to maximize contrast and image sharpness.

Specifications:

  • Optical Design: Maksutov-Cassegrain
  • Aperture (mm): 90 mm (3.54 in)
  • Focal Length: 1250 mm
  • Focal Ratio: f/13.8
  • Finderscope: Red Dot Finder
  • Diagonal: 1.25” 90 degree Star diagonal
  • Highest Useful Magnification: 180x
  • Optical Coatings: Fully multi-coated
Additional Information:
  • OTA length: 10"
  • OTA width: 4.125"
  • OTA weight (with accessories): 3.6 lbs

Product carries full 2 year manufacturer factory limited warranty (within US only).

Manufacturer part number: S11230

Manufacturer Sky Watcher
General Specs
Focuser Primary Mirror
OTA Length 11" (Retract/Ext.)
OTA Outer Diameter 4.125"
OTA Weight (with accessories) 3.6 lb
Optical Specs
Optical Design Mak-Cass
Mirror Coatings 94% Aluminum
Lens Coatings Fully Multi-Coated
Glass Type BK7/Borosilicate
True Aperture (mm) N/A
Primary Aperture (mm) 90
Primary Edge Thickness N/A
F/Ratio 13.9
Focal Length (mm) 1250
Secondary Diameter 29mm
Secondary Obstruction (by diameter) 32%
Secondary Obstruction by Area 10%
Included 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
Observational Specs.
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%

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