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Sky Watcher 180mm Maksutov-Cassegrain Telescope # S11540

Our Price: $1,200.00
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In Stock (1 Available)
Ships in 1-3 Business Days
Our Product ID: T-SW-S11540
Manufacturer SKU: S11540
Item Can Ship: To US Only
Sky Watcher 180mm Maksutov-Cassegrain Telescope # S11540

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  • Sky Watcher 180mm Maksutov-Cassegrain Telescope # S11540
  • Sky Watcher 180mm Maksutov-Cassegrain Telescope # S11540
  • Sky Watcher 180mm Maksutov-Cassegrain Telescope # S11540
  • Sky Watcher 180mm Maksutov-Cassegrain Telescope # S11540
  • Sky Watcher 180mm Maksutov-Cassegrain Telescope # S11540
  • Sky Watcher 180mm Maksutov-Cassegrain Telescope # S11540
  • Sky Watcher 180mm Maksutov-Cassegrain Telescope # S11540

Please note: Due to high shipping costs and low profit margins on this item, we might ship this from our stock or have the manufacturer drop ship this item to you.

  • If this page lists the item as "In Stock", your order will ship within 3 days either from us or from the manufacturer.
  • If this page lists the item as "Back Order" or "Drop Ship", it will be drop shipped from the manufacturer subject to their availability. In case of any delays for back-ordered or drop-shipped items, we will contact you promptly and update you on its status. Or you can contact us first and we can get you a shipping estimate before you order.

Quick Overview

  • 180mm Maksutov-Cassegrain
  • 2700 mm (f/15)
  • Fully multi-coated
  • 8×50 straight-through finderscope
  • 2” 90 degree Star diagonal
  • 28mm 2” LET eyepiece
  • 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.


  • Optical Design: Maksutov-Cassegrain
  • Aperture (mm): 180 mm (7.08 in)
  • Focal Length: 2700 mm
  • Focal Ratio: f/15
  • Focal Length of Eyepiece 1 (mm): 28 mm
  • Finderscope: 8x50
  • Highest Useful Magnification: 360x
  • Optical Coatings: Fully multi-coated

Additional Information:

  • OTA length: 22"
  • OTA width: 8.625"
  • OTA weight (with accessories): 19 lbs


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

Manufacturer part number: S11540

Manufacturer Sky Watcher
General Specs
Focuser Primary Mirror
OTA Length 22" (Retract/Ext.)
OTA Outer Diameter 8.625"
OTA Weight (with accessories) 19 lb
Optical Specs
Optical Design Mak-Cass
Mirror Coatings 94% Aluminum
Lens Coatings Fully Multi-Coated
Glass Type BK7/Borosilicate
True Aperture (mm) 182
Primary Aperture (mm) 199
Primary Edge Thickness N/A
F/Ratio 15
Focal Length (mm) 2700
Secondary Diameter 41mm
Secondary Obstruction (by diameter) 23%
Secondary Obstruction by Area 5%
Included 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
Observational Specs.
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%