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

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

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

B&H # SK127MMMCOTA MFR # S11520
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Value: $35.00

Product Highlights

  • 127mm Aperture Maksutov-Cassegrain OTA
  • 1500mm Focal Length, f/12 Focal Ratio
  • Limited-Diffraction Optical System
  • Fully Multi-Coated Optics
  • Internal Primary Mirror Focusing System
  • 2" 28mm Eyepiece, 90° Star Diagonal
  • 6x30 Finderscope
  • Vixen-Style Dovetail Plate
  • OTA Only - Mount and Tripod Required
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Sky-Watcher S11520 overview

  • 1Description

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
In the Box
Sky-Watcher 127mm f/13 Maksutov-Cassegrain Telescope (OTA Only)
  • 90° Star Diagonal
  • 28mm Eyepiece
  • 6x30 Finderscope
  • Limited 2-Year Warranty
  • Table of Contents
    • 1Description

    Sky-Watcher S11520 specs

    Optical Design Maksutov-Cassegrain
    Aperture 127mm
    Focal Length 1500mm
    Focal Ratio f/11.8
    Eyepiece Barrel Diameter 2"
    Diagonal 90° star
    2" snout and eyepiece holder
    Finderscope 6x30
    Tripod None
    Mount Type Vixen-style dovetail plate
    Power Source N/A
    Optical Tube Dimensions Not specified by manufacturer
    Weight 9.7 lb / 4.4 kg
    Packaging Infowxdbuqxyuurvwfuusdtezyv
    Package Weight 12.8 lb
    Box Dimensions (LxWxH) 28.1 x 9.7 x 9.2"

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