Meade ETX90 Observer 90mm f/13.8 Maksutov-Cassegrain GoTo Telescope

Meade ETX90 Observer 90mm f/13.8 Maksutov-Cassegrain GoTo Telescope

Meade ETX90 Observer 90mm f/13.8 Maksutov-Cassegrain GoTo Telescope

B&H # METX90CASE MFR # 205004
Meade ETX90 Observer 90mm f/13.8 Maksutov-Cassegrain GoTo Telescope

Meade ETX90 Observer 90mm f/13.8 Maksutov-Cassegrain GoTo Telescope

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Product Highlights

  • 90mm Maksutov-Cassegrain Telescope
  • 1250mm Focal Length, f/13.8 Focal Ratio
  • UTHC Fully Multi-Coated Optics
  • Dual-Fork Motorized Alt-Az Mount
  • Autostar GoTo Hand Controller
  • 30,000+ Object Updateable Database
  • Guided Tours, Multiple Alignment Options
  • Adjustable Stainless Steel Tripod
  • Two Eyepieces and Red-Dot Finder
  • Hard OTA/Mount Carrying Case, Tripod Bag
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Accessories: Observer Accessory Package

Observer Accessory Package Standard Accessory Package

Not available with current selections

Aperture: 90mm f/13.8

127mm f/15

Not available with current selections

90mm f/13.8
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  • 1Description

With their ETX90 Observer 90mm f/13.8 Maksutov-Cassegrain GoTo Telescope, Meade gives you a complete GoTo-capable observation rig, including the means to safely store and carry your gear. Similar to their Schmidt cousins, this 90mm f/13.9 Maksutov-Cassegrain telescope exchanges the front corrector plate with a convex meniscus lens which not only eliminates the need for periodic collimation, but the nature of the lens requires a smaller secondary mirror which limits obstruction and increases contrast. The Mak-Cass optical path results in a slower focal ratio and narrower field of view versus a similar Schmidt-Cass, but the optical benefits makes this an ideal scope for planetary and double-star observation. For those who want to use it for astrophotography, an internal mirror flips down to direct the optical path straight back for prime-focus photography using a DSLR camera body and optional adapters. An equatorial tilt plate is included which allows for proper polar alignment and single-axis tracking, for smoother and more precise tracking as required by long-exposure photography.

The brains of this system is Meade's revolutionary Autostar hand controller. Equipped with a 2-line LED display and 20-key red backlit keypad, it controls the motorized mount for precise GoTo capabilities. Its internal 30,000+ object database is updateable via the internet, and has the capability to take you on a hands-free guided tour of the night sky above them. To consult star charts, logs, or to change eyepieces and filters, the controller also has a built-in red LED utility light that won't affect your night-adjusted vision.

This kit also includes two eyepieces that produce 48x and 129x magnifications for well-rounded observational options, plus a red-dot finder which with its exceptional field of view makes finding objects faster and easier. To complete to package is a sturdy stainless steel tripod to support all the gear; plus a hard carrying case for the mount, OTA and accessories, and a carrying bag for the tripod.

Optical Performance
  • 90mm aperture
  • f/13.8 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
  • Proprietary UTHC fully multicoated optics reduce light loss and increase color fidelity and contrast
  • BK7 optical glass correcting lens
  • Pyrex glass primary mirror
  • Resolution: 1.29 arc sec
  • Close focus distance: 11.5 ft (3.5m)
  • Internal 90° flip mirror with photo-back for prime-focus astrophotography
Motors and Mount
  • Motors:
    • Dual DC servo motors with encoders
    • Bearings:
      • Altitude: UHMW polyethylene
      • Azimuth: PTFE
    • Runs on eight user-supplied AA batteries with a max runtime of 20 hours when using the Autostar
  • Mount:
    • Dual fork, alt-az
    • Vixen-style dovetail saddle and plate
    • Compact design: 15x7x9"
Autostar Hand 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
    • Multiple alignment methods
    • Guided tours available
  • Powered by mount to be lighter and easier to use
  • 24" coiled cord
  • Updateable via Internet using RS-232 port
Included Accessories
  • Red-dot finder for fast and easy alignment
  • Eyepieces:
    • 1.25" diameter barrel
    • 26mm Super Plössl produces 48x
    • 9.7mm Super Plössl produces 129x
    • Accept most 1.25" filters and accessories
  • Tripod:
    • Adjustable height
    • Stainless steel legs
    • Leg-locking plate for additional stability
    • Equatorial mounting plate for precise polar alignment required for long-exposure astrophotography
  • Combination bubble level and compass
  • Hard carrying case for OTA, mount and accessories
  • Carrying bag for tripod with shoulder strap
UPC: 709942997514
In the Box
Meade ETX90 Observer 90mm f/13.8 Maksutov-Cassegrain GoTo Telescope
  • ETX-90 AT 3.5"/90mm UHTC Catadioptric Telescope Kit
  • Bubble Level/Compass
  • Super Plössl 9.7mm Eyepiece
  • Equatorial Mounting Plate
  • Hard Carrying Case for Mount/OTA
  • Limited One-Year Warranty
  • Table of Contents
    • 1Description
    Optical Design Maksutov-Cassegrain
    Aperture 3.5" / 90 mm
    Focal Length 1250 mm
    Focal Ratio f/13.8
    GoTo System Autostar hand controller
    30,000+ object updateable database
    Dimensions:
         Length: 6.6" / 16.6 cm
         Width, top: 3.2" / 80.0 cm
         Width, bottom: 2.25" / 57.0 cm
         Depth: 0.81" / 21.0 cm
    Weight:
         17.9 oz / 508.0 g
    Eyepiece Barrel Diameter 1.25"
    Diagonal Internal 90° star
    Viewfinder Red-Dot
    Tripod Adjustable-height steel leg tripod
    Mount Type Dual fork alt-azimuth
    Power Source 8 x AA batteries, 20 h max runtime
    12 VDC power cord
    Dimensions OTA: 11.0 x 4.1" / 10.4 x 27.9 cm
    Total: 15.0 x 9.0 x 7.0" / 38.0 x 22.0 x 18.0 cm
    Weight Telescope: 7.8 lb / 3.5 kg, including Autostar and batteries
    Tripod: 13.3 lb / 6.0 kg
    Packaging Info
    Package Weight 43.0 lb
    Box Dimensions (LxWxH) 34.0 x 26.0 x 12.0"

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