Meade StarNavigator NG 90mm f/13.9 GoTo Maksutov-Cassegrain Telescope

Meade StarNavigator NG 90mm f/13.9 GoTo Maksutov-Cassegrain Telescope

Meade StarNavigator NG 90mm f/13.9 GoTo Maksutov-Cassegrain Telescope

B&H # ME90SNMT MFR # 218005
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Product Highlights

  • 90mm Maksutov-Cassegrain OTA
  • 1250mm Focal Length, f/13.8 Focal Ratio
  • Anti-Reflection Multi-Coated Optics
  • 1.25" Holder with 9mm and 26mm Eyepieces
  • Single-Fork Arm Motorized Alt-Az Mount
  • AudioStar Computer Hand Controller
  • Updateable 30,000+ Object Database
  • One or Two-Star, and Easy Alignment
  • Audio Commentary on 500 Objects
  • Adjustable-Height Aluminum Tripod
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Aperture: 90mm, f/13.8

125mm, f/15 90mm, f/13.8
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  • 1Description

Meade Instruments' compact StarNavigator NG 90mm f/13.9 GoTo Maksutov-Cassegrain Telescope is ideal for users who want a portable yet powerful observation platform that is able to achieve high magnifications for detailed views of the moon and planets as well as the ability to reach out past our solar system to observe brighter deep-sky objects such as nebulae and galaxies. The compact and powerful Maksutov design uses a front corrector plate with a convex meniscus lens to correct off-axis aberrations, like comas, and chromatic aberration to produce images with true color rendition. The nature of the lens results in a smaller secondary mirror - limiting obstruction and increasing contrast, while eliminating the need for periodic collimation. This optical path results in a slower focal ratio and narrower field of view versus a similar Schmidt-Cassegrain variant, but the optical benefits makes this an ideal scope for all types of celestial observations.

Driving the dual-axis DC servo motors in the single-arm fork mount is the AudioStar hand controller. This update to their iconic AutoStar enables quick and easy set up and alignment to get you observing faster, while offering guided tours and audio commentary on 500 of its over 30,000 objects in the internal database. For those who want to use it for astrophotography, an internal mirror flips down to direct the light path straight back for prime-focus photography using a DSLR camera body and optional adapters. An equatorial tilt plate is integrated into the tripod, which allows for proper polar alignment and single-axis tracking for smoother and more precise tracking as required by long-exposure photography.

Optical Performance
  • 90mm aperture
  • f/13.9 focal ratio
  • 1250mm focal length
  • Maksutov-Cassegrain optical configuration
  • 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
  • Resolution: 1.3 arcsec
  • Internal flip mirror
  • Single-speed internal focuser
  • Vixen-style dovetail plate
AudioStar Controller
  • Two-line LED display
  • Twenty-key alphanumeric keypad, red LED backlight
  • 68HC11, 8MHz processor
  • Built-in red utility light
  • 30,000+ object database
  • User-friendly menu-driven system navigation
  • Slew speeds: 1x, 2, 8x, 16x, 64x, 0.5°/sec, 1°/sec, 1.5°/sec, 4°/sec (max)
  • Assisted alignment procedures: Easy (Two-Star), One-star, Two-star, Three-star
  • Customizable guided tours for specific day, time, and location
  • Built-in speaker provides descriptions of over 500 objects including scientific data and history
  • Projects events to plan future astronomy sessions such as Sunrise/sunsets, Moon phases/moon rise/moon set, Meteor showers; Lunar/solar eclipses, Equinoxes/solstices
  • Backlash compensation allows user to train-out the intrinsic play between gears to improve GoTo and tracking accuracy
  • Powered by mount to be lighter and easier to use
  • 24" coiled cord
  • Updateable via Internet using RS-232 port
    Database Details:
  • Solar system; including moon, sun, planets
  • Comets and asteroids
  • 88 major constellations
  • Popular named objects
  • Galaxies, quasars, and nebulae
  • Multiple catalogs including Messier, Caldwell, and NGC
  • Stars; including named stars, SAO catalog, double stars, variable stars
  • Satellites, including the International Space Station (ISS), and Hubble Space Telescope (HST)
  • User-defined astronomical and terrestrial objects
    Dimensions:
  • Length: 6.6" (17cm)
  • Width, top: 3.2" 80cm)
  • Width, bottom: 2.25" (57cm)
  • Depth: 0.8" (21cm)
  • Weight: 17.9 oz (508g)
Mount and Tripod
    Mount:
  • Single fork-arm motorized alt-azimuth
  • Dual-axis DC servo motors provides smooth and accurate variable-rate tracking
  • Vixen-style dovetail saddle
  • Runs on eight AA user-supplied batteries
    Tripod:
  • Adjustable height
  • Aluminum alloy legs, 2-sections
  • Leg-locking plate for additional stability
Internal Flip Mirror
  • 90° flip mechanism enables easy change of optical path
  • Mirror-Down: Straight-through light path to back for prime-focus astrophotography or imaging with optional accessories
  • Mirror-Up: 1.25" eyepiece holder on top accepts most astronomical eyepieces
  • When used together for astroimaging, flip mirror up to check/adjust tracking then flip down for image capture
  • When up, the mirror acts as a star diagonal to correct image horizontally for use as a terrestrial spotting scope
Included Accessories
    Eyepieces:
  • 1.25" diameter barrel
  • Accept most 1.25" eyepiece filters
  • 9mm eyepiece produces 139x
  • 26mm eyepiece produces 48x
    Finder:
  • Unmagnified view ensures a wide field of view to aid in fast alignment
  • Simple center red aiming dot won't obscure small or dim objects
  • Variable intensity reticle preserves night-adjusted vision
UPC: 709942997965
In the Box
Meade StarNavigator NG 90mm f/13.9 GoTo Maksutov-Cassegrain Telescope
  • AudioStar GoTo Hand Controller
  • 9mm Eyepiece
  • 26mm Eyepiece
  • Red-Dot Finder with Bracket
  • Bubble Level/Compass
  • AudioStar Software DVD
  • Limited One-Year Warranty
  • Table of Contents
    • 1Description
    Optical Design Maksutov-Cassegrain
    Aperture 90 mm
    Focal Length 1250 mm
    Focal Ratio f/13.9
    Eyepiece Barrel Diameter 1.25"
    Diagonal Internal 90° flip
    GoTo System AudioStar controller
    Finderscope Red-dot
    Tripod Adjustable-height, aluminum
    Mount Type Motorized alt-az, single fork-arm
    Power Source 8 x AA batteries
    Dimensions 53.0 x 24.0 x 24.0" / 134.6 x 61.0 x 61.0 cm, fully assembled
    Weight 12.3 lb / 5.6 kg, total
    Packaging Info
    Package Weight 22.0 lb
    Box Dimensions (LxWxH) 31.4 x 18.5 x 9.0"
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