Sky-Watcher 102mm f/13 Maksutov-Cassegrain Telescope (OTA Only)

Sky-Watcher 102mm f/13 Maksutov-Cassegrain Telescope (OTA Only)

Sky-Watcher 102mm f/13 Maksutov-Cassegrain Telescope (OTA Only)

B&H # SK102MMMCOTA MFR # S11510
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Value: $27.00

Product Highlights

  • 102mm Aperture Maksutov-Cassegrain OTA
  • 1300mm Focal Length, f/13 Focal Ratio
  • Limited-Diffraction Optical System
  • Fully Multi-Coated Optics
  • Internal Primary Mirror Focusing System
  • 25mm & 10mm 1.25" Eyepieces
  • 1.25" 90° Star Diagonal
  • Red Dot Finderscope
  • Vixen-Style Dovetail Plate
  • OTA Only - Mount and Tripod Required
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Options: OTA Only

OTA Only OTA, GoTo Mount, Tripod


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  • 1Description

Similar to their Schmidt cousins, this 102mm f/13 Maksutov-Cassegrain Telescope from Sky-Watcher exchanges the conventional front corrector plate with a convex meniscus lens which results in a smaller secondary mirror - limiting obstruction and increasing 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, makes this an ideal scope for solar, lunar, planetary and deep-sky observation of bright objects like stars and clusters.

The scope is outfitted with a 1.25" visual back and, to get users started, Sky-Watcher includes 10mm and 25mm eyepieces that produce low and moderate magnifications, and a 90° star diagonal for more comfortable viewing when the OTA pointed at or near the celestial zenith. The OTA is offered here without a mount or tripod for users that have a platform, or want to use it as part of a dual-OTA set up 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
  • 102mm aperture
  • f/13 focal ratio
  • 1300mm focal length
  • Front convex meniscus lens corrects spherical and chromatic aberrations, and comas (off-axis aberration) 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: 1.01 arc sec
  • Internal primary mirror focus
  • .25" diameter visual back accepts larger eyepieces
  • Requires user-supplied mount and tripod
  • Vixen-style dovetail plate
  • Weight: 4.6 pounds including OTA, dovetail plate, finder, diagonal and eyepiece
Included Accessories
  • 1.25" barrel diameter
  • Accepts most 1.25" astronomical filters
  • 25mm eyepiece yields 52x power
  • 10mm eyepiece produces 130x magnification
  • 1.25" snout and eyepiece holder
  • 90° angle places head in a comfortable viewing position
  • Star configuration corrects image horizontally for terrestrial use
  • Unmagnified view provides a wide field of view for easier alignment and faster star-hopping navigation
  • Red center aiming dot won't obstruct objects
  • Variable intensity to preserve night-adjusted vision
UPC: 050234115100
In the Box
Sky-Watcher 102mm f/13 Maksutov-Cassegrain Telescope (OTA Only)
  • 90° Star Diagonal, 1.25" Barrel
  • 25mm Eyepiece, 1.25" Barrel
  • 10mm Eyepiece, 1.25" Barrel
  • Red Dot Finderscope
  • Limited Two-Year Warranty
  • Table of Contents
    • 1Description
    Optical Design Maksutov-Cassegrain
    Aperture 102 mm
    Focal Length 1300 mm
    Focal Ratio f/12.7
    Eyepiece Barrel Diameter 1.25"
    Diagonal 90° star
    Finderscope Red dot
    Tripod None
    Mount Type Vixen-style dovetail plate
    Power Source N/A
    Optical Tube Dimensions Not specified by manufacturer
    Weight 4.6 lb / 2.1 kg
    Packaging Infozytdzxetszyuyyrdzewwxxdwzytccduwwuve
    Package Weight 10.0 lb
    Box Dimensions (LxWxH) 23.0 x 10.0 x 10.0"
    102mm f/13 Maksutov-Cassegrain Telescope (OTA Only) is rated 5.0 out of 5 by 1.
    Rated 5 out of 5 by from Sharp optics in a small, affordable package. Don't let this little Maksutov's size fool you! This little 4 inch scope provides sharp, crisp, views of solar system objects, double stars, and the brighter deep sky objects. The views have excellent contrast, focusing is very smooth, and the Vixen/Synta style dovetail with 1/4-20 mounting holes provides many options for available tripods. The included eyepieces, and diagonal, along with the easy to use red dot reflex finder, make this an excellent package to get you started. Plus, the scope comes packaged in a nice soft carrying bag, making this a good choice for a grab and go scope for quick viewing sessions. It also includes a 1.25 visual back, that is threaded to accept a T ring camera mount. For my first viewing session, I mounted it to my Explore Scientific Twilight 1 mount, and enjoyed some great views of Jupiter, the globular star cluster, M13 in Hercules, and late in the evening, fantastic views of Saturn. The optics are sharp enough to easily handle being pushed to 150x magnification on an evening of mediocre seeing. I was able to couple my Rebel T5 to the scope the first session, along with a 2x barlow, and get a nice image of Jupiter. The attached, single image, is simply cropped, and lightened up just a bit, no other processing was applied. Every time I use it, I am amazed at the detail it is able to resolve, being such a small instrument. Sky Watcher offers a true winner with this scope, combined with the included accessories. As an added bonus, this can be used as a full manual, 1300mm telephoto lens during the daytime.
    Date published: 2017-05-29
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