Sky-Watcher Skymax 102 AZ-GTi 102mm f/13 GoTo Maksutov-Cassegrain Telescope

Sky-Watcher Skymax 102 AZ-GTi 102mm f/13 GoTo Maksutov-Cassegrain Telescope

Sky-Watcher Skymax 102 AZ-GTi 102mm f/13 GoTo Maksutov-Cassegrain Telescope

B&H # SKS21120 MFR # S21120
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Product Highlights

  • 102mm Aperture Maksutov-Cassegrain OTA
  • 1300mm Focal Length, f/13 Focal Ratio
  • Limited-Diffraction Optical System
  • Motorized Computer-Controlled AZ Mount
  • Built-In WiFi Module for Remote Control
  • Free Android & iOS SynScan Pro WiFi App
  • 42,900+ Object Database
  • Day/Night-Assisted Alignment Procedures
  • Two 1.25" Eyepieces, 90° Diagonal
  • Aluminum Tripod with Extension Pier
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Options: OTA, GoTo Mount, Tripod

OTA Only OTA, GoTo Mount, Tripod

Aperture: 102mm, f/13

102mm, f/13 127mm, f/12

More on the Way

150mm, f/12

Not available with current selections

180mm, f/15

Not available with current selections

90mm, f/14

Not available with current selections

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Sky-Watcher Skymax 102 AZ-GTi overview

  • 1Description

Combining portability with connectivity, the Sky-Watcher Skymax 102 AZ-GTi 102mm f/13 GoTo Maksutov-Cassegrain Telescope gives users an easy-to-use observational platform for viewing the Moon, planets, and brighter deep-sky objects right out of the box.

The compact Maksutov-Cassegrain design is combined with a limited-diffraction optical system and fully multi-coated lens surfaces. The Mak design corrects off-axis aberrations like comas and chromatic aberrations, while the limited-diffraction system prevents light from being scattered by defects in the mirrors and corrector plate. These complementary features, plus the anti-reflection coatings, work together to produce crisp and clear views with true-color rendition and improved contrast and resolution.

Guiding the optical tube assembly (OTA) is Sky-Watcher's AZ-GTi GoTo AZ mount. It features an integrated WiFi module that generates its own local network signal to allow wireless control via a smartphone running their free SynScan Pro app for Android and iOS devices. The app is intuitively laid out for easy setup, navigation, and exploration of the sky—even if you've never looked through a telescope before. Packed with over 42,900 objects with daytime and nighttime alignment-assistance procedures, plus advanced features such as periodic error correction, backlash compensation, tours, and DSLR camera control, the SynScan app is a powerful yet easy-to-use way to control the mount.

To give users a complete observation platform, Sky-Watcher includes a sturdy yet lightweight aluminum tripod that comes with an extension pier. The pier adds additional height for easier viewing when the OTA is aimed at or near the zenith. Two eyepieces, which produce 52x and 130x magnifications, give you a comfortable range for viewing near- and deep-sky objects, while a 90° diagonal places your head in a more comfortable and natural viewing position.

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

    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 mirrorlimiting 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, make 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 10 and 25mm eyepieces that produce low and moderate magnifications 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
    • 102mm aperture
    • f/13 focal ratio
    • 1300mm 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: 1.01 arcsec
    • Internal primary mirror focus
    • 1.25"-diameter visual back takes 1.25” eyepieces and accessories 
    Mounting
    • Requires user-supplied mount and tripod
    • Vixen-style dovetail plate
    • Weight: 4.6 pounds including OTA, dovetail plate, finder, diagonal, and eyepiece
    Included Accessories
    • Eyepieces:
    • 1.25" barrel diameter
    • Accept most 1.25" astronomical filters
    • 25mm eyepiece yields 52x power
    • 10mm eyepiece produces 130x magnification
    • Diagonal:
    • 1.25" snout and eyepiece holder
    • 90° angle places head in a comfortable viewing position
    • Star configuration corrects image horizontally for terrestrial use
    • Finderscope:
    • 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
  • AZ-GTi GoTo AZ Mount

    Ideal for small- to medium-aperture refractors and catadioptrics, the Sky-Watcher AZ-GTi GoTo AZ Mount features an integrated WiFi module that generates its own local network signal to allow wireless control via a smartphone running their free SynScan Pro app for Android and iOS devices. The app is intuitively laid out for easy setup, navigation, and exploration of the sky—even if you've never looked through a telescope before. Packed with over 42,900 objects with daytime and nighttime alignment-assistance procedures, plus advanced features such as periodic error correction (PEC), backlash compensation, tours, and DSLR camera control, the SynScan app is a powerful yet easy-to-use way to control the mount.

    Dual-axis motors slew to and track objects, while dual encoders on each axis precisely follow the mount's movement and maintain its alignment—even if the mount is moved by hand. A Vixen-style dovetail saddle makes mounting a variety of optical tube assemblies (OTAs) fast and easy, and with a payload capacity of up to 11 pounds it is ideal for refractors and Maksutov-Cassegrain telescopes. Supporting the mount is an adjustable-height aluminum tripod. The AZ-GTi comes with a pier extension that is located between the tripod and mount head to provide additional height for easier viewing without sacrificing stability when the OTA is aimed at or near the zenith.

    Mount
    • Motorized alt-azimuth design
    • Integrated WiFi module allows for direct connection to smartphones without the need for routers or Internet connection
    • DC servo motors precisely move the mount on both axes with minimum vibration
    • Dual encoders on each axis maintain alignment, even when mount is moved by hand, letting you move the mount manually across the sky while keeping GoTo functionality
    • Altitude and azimuth clutch knobs enable easy manual movement
    • SNAP port allows optional remote shutter-release cables to be connected to mount for advanced astrophotography
    • Runs on eight user-supplied AA batteries or optional 12 VDC power cord
    SynScan App
    • Free app for Android and iOS devices
    • Align, move, and control mount wirelessly
    • Automatic day, date, time, and location using the device's GPS unit
    • 42,900+ object database, similar to the conventional SynScan hand controller
    • Sky tour shows best deep-sky objects visible at a specific day/date/time
    • Solar, lunar, sidereal tracking rates
    • Slew speeds: 0.5x, 1x, 8x, 16x, 32x, 64x, 128x, 400x, 600x, Max (800x/3.4°/sec)
    • Assisted nighttime and daytime alignment procedures
    • Periodic error correction (PEC) allows user to train out intrinsic tracking errors and save them into the permanent memory to improve GoTo and tracking accuracy over time
    • Backlash compensation eliminates the backlash experienced when gears stop and settle for improved GoTo and slewing accuracy
    • DSLR shutter release and exposure control enable long-exposure, time-lapse, and other advanced astrophotography techniques to be controlled by the app through the SNAP port on mount

    Database Details:

    • Solar system, including Moon, Sun, and planets
    • NGC catalog
    • IC catalog
    • Messier catalog
    • Caldwell catalog
    • SAO catalog
    • Named stars
    • Double (binary) stars
    • Variable stars
    • User-defined celestial and terrestrial objects

     

    Tripod and Extension Pier
    • Adjustable-height aluminum-legged tripod
    • Max height: 43.3"
    • Max leg spread: 42.3"
    • Spiked feet provide greater stability on rough, uneven, and soft ground
    • Center tray holds accessories such as eyepieces, filters, phones, and flashlights
    • Extension pier placed between the tripod and mount head adds height for more comfortable viewing without sacrificing stability or increasing vibration when the OTA is pointed at or near the zenith 
    UPC: 050234211109
In the Box
Bundle Items
  • 90° Star Diagonal, 1.25" Barrel
  • 25mm Eyepiece, 1.25" Barrel
  • 10mm Eyepiece, 1.25" Barrel
  • Red Dot Finderscope
  • Limited 2-Year Warranty
  • Pier Extension
  • Tripod with Tray
  • Limited 2-Year Warranty
Table of Contents
  • 1Description
  • 102mm f/13 Maksutov-Cassegrain Telescope (OTA Only)
    Optical Design Maksutov-Cassegrain
    Aperture 102mm
    Focal Length 1300mm
    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 Inforqrraxccbd
    Box Dimensions (LxWxH) 23.0 x 10.0 x 10.0"
  • AZ-GTi GoTo AZ Mount
    Mount Type Motorized alt-azimuth
    Load Capacity 11 lb / 5.0 kg
    Motor Dual axis with digital encoders
    GoTo Capability Yes
    Altitude / Latitude Adjustment Not specified by manufacturer
    Polar Axis Scope None
    Includes Tripod/Pier Aluminum, adjustable height
    Max height: 43.3" / 110.0 cm
    Max leg spread: 42.3" / 107.4 cm
    Pier extension
    Power Source 8 x AA batteries or 12VDC power cord
    Dimensions 5.9 x 3.5" / 15.1 x 9.0 cm
    Weight Mount: 2.9 lb / 1.3 kg
    Tripod: 4.2 lb / 1.9 kg
    Pier extension: 1.1 lb / 0.5 kg
    Packaging Info
    Box Dimensions (LxWxH) 45.0 x 10.0 x 9.0"

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