Sky-Watcher 127mm f/13 Maksutov-Cassegrain Telescope (OTA Only)

BH #SK127MMMCOTA • MFR #S11520
Sky-Watcher
Sky-Watcher 127mm f/13 Maksutov-Cassegrain Telescope (OTA Only)
Key Features
  • 127mm Aperture Maksutov-Cassegrain OTA
  • 1500mm Focal Length, f/12 Focal Ratio
  • Limited-Diffraction Optical System
  • Fully Multi-Coated Optics
Balancing aperture with manageability and representing the mid-range size in the series, the Sky-Watcher 127mm f/12 Maksutov-Cassegrain Telescope exchanges the conventional front corrector plate of a Schmidt with a convex meniscus lens, resulting in a smaller secondary mirror that limits obstruction and increases contrast, while eliminating the need for periodic collimation. The Maksutov optical path results in a slower focal ratio and narrower field of view versus a similar Schmidt, but the optical benefits, when coupled with the larger aperture and fully multi-coated optics, make this an ideal scope for making detailed solar, lunar, and planetary observations, while being able to resolve bright deep-sky objects like stars, clusters, galaxies, and nebulae.
In Stock
$400.00
Price $435.00
Instant Savings $35.00

Sky-Watcher 127mm f/13 Maksutov-Cassegrain Telescope (OTA Only)

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Sky-Watcher S11520 Overview

  • 1Description
  • 2Optical Performance
  • 3Mounting
  • 4Included Accessories

Balancing aperture with manageability and representing the mid-range size in the series, the Sky-Watcher 127mm f/12 Maksutov-Cassegrain Telescope exchanges the conventional front corrector plate of a Schmidt with a convex meniscus lens, resulting in a smaller secondary mirror that limits obstruction and increases contrast, while eliminating the need for periodic collimation. The Maksutov optical path results in a slower focal ratio and narrower field of view versus a similar Schmidt, but the optical benefits, when coupled with the larger aperture and fully multi-coated optics, make this an ideal scope for making detailed solar, lunar, and planetary observations, while being able to resolve bright deep-sky objects like stars, clusters, galaxies, and nebulae.

The scope is outfitted with a large 2" visual back and, to get users started, Sky-Watcher includes a 28mm long eye relief eyepiece that produces a moderate magnification and a 90° star diagonal for more comfortable viewing when the optical tube assembly (OTA) is pointed at or near the celestial zenith. The OTA is offered here without a mount or tripod for users who have a platform or want to use it as part of a dual-OTA setup for star parties or observation/imaging rigs. It is outfitted with a Vixen-style dovetail plate for easy attachment onto many mounts. This OTA's compact form factor belies its observation power and resolution and is ideally suited as a grab-and-go option for quick observation sessions or heading out to remote locations.

Optical Performance

  • 127mm aperture
  • f/12 focal ratio
  • 1500mm focal length
  • Front convex meniscus lens corrects spherical and chromatic aberrations and comas (off-axis aberrations) across the entire field of view
  • Smaller secondary mirror versus Schmidt-Cassegrains reduces obstructions and increases contrast
  • Fully multi-coated optics maximize light transmission to improve brightness, color rendition, sharpness, and contrast
  • Resolution: 0.91 arcsec
  • Internal primary mirror focus
  • 2"-diameter visual back accepts larger eyepieces and accessories

Mounting

  • Requires user-supplied mount and tripod
  • Vixen-style dovetail plate
  • Weight: 9.7 pounds including OTA, dovetail plate, finder, diagonal, and eyepiece

Included Accessories

  • Eyepiece:
  • 2" barrel diameter
  • Accepts most 2" astronomical filters
  • 28mm eyepiece yields 54x power
  • Comfortable long eye relief
  • Diagonal:
  • 2" snout and eyepiece holder
  • 90° angle places head in a comfortable viewing position
  • Star configuration corrects image horizontally for terrestrial use
  • Finderscope:
  • Low 6x magnification provides a wide field of view for easier alignment and faster star-hopping navigation
  • 30mm aperture helps resolve dimmer objects that dot finders cannot
UPC: 050234115209

Sky-Watcher S11520 Specs

Optical Tube Assembly
Optical DesignMaksutov Cassegrain
Aperture127 mm / 5"
Focal Length1500 mm
Focal Ratiof/11.8
FocuserInternal
Eyepiece Barrel Diameter1.25", 2"
Diagonal90° Star
FinderscopeYes
Mounting SystemVixen Style
General
BatteriesNone
GPSNo
Wi-FiNo
Weight9.7 lb / 4.4 kg
Packaging Info
Package Weight12.8 lb
Box Dimensions (LxWxH)28.1 x 9.7 x 9.2"
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