Konus MotorMax-90 90mm f/13.3 Maksutov-Cassegrain Telescope with RA Motor

Konus MotorMax-90 90mm f/13.3 Maksutov-Cassegrain Telescope with RA Motor

Konus MotorMax-90 90mm f/13.3 Maksutov-Cassegrain Telescope with RA Motor

B&H # KOD90F1250M MFR # 1795
Konus MotorMax-90 90mm f/13.3 Maksutov-Cassegrain Telescope with RA Motor

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Product Highlights

  • 3.5" / 90mm Aperture
  • 1200mm Focal Length, f/13.3 Focal Ratio
  • Internal Primary Mirror Focusing System
  • Internal Flip-Mirror
  • 10mm and 17mm Plossl Eyepieces
  • 45° Star Diagonal
  • 8x21 Straight-View Finderscope
  • Moon Filter
  • Smartphone Holder
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  • 1Description

Konus's MotorMax-90 90mm f/13.3 Maksutov-Cassegrain Telescope employs a front convex meniscus lens which not only eliminates the need for periodic collimation, but also requires a smaller secondary mirror when compared to a Schmidt-Cassegrain design. The Mak-Cass optical path results in a slower focal ratio and narrower field of view versus a similar Schmidt, but the optical benefits makes this an ideal scope for planetary and double-star observation.

The scope is outfitted with a German equatorial mount and features a Right Ascension motor to track objects during extended observation sessions. To make manual adjustments, there are also RA and Declination cables. Utilizing the RA motor not only frees you to concentrate on observation, it also greatly reduces vibration - especially at higher magnifications - for clearer viewing.

An internal flip mirror redirects the light path from the eyepiece holder on top of the OTA to the visual back, and for more comfortable viewing a 45° star diagonal is also included. The scope comes with two eyepieces that produce 70x and 120x power as well as a moon filter to safely observe the Moon.

Optical Performance
  • 3.5" (90mm) aperture
  • f/13.3 focal ratio
  • 1200mm focal length
  • Compact Maksutov- Cassegrain optical design
  • Front convex meniscus lens helps to correct for spherical aberration for reduced distortion at the edges of the field of view
  • Anti-reflection multicoated optics to reduce light loss and increase contrast and image brightness
  • Internal flip-mirror directs optical path from visual back to upper 90° eyepiece holder
  • German equatorial mount
  • Right Ascension tracking motor, runs on one 9V battery
  • Manual RA and Declination slow motion cables
  • Bar and counterweight for proper balancing
  • Aluminum 2-stage tripod, adjusts from 29-48" high
  • 10mm focal length, 1.25" diameter barrel, eyepiece: 120x power
  • 17mm focal length, 1.25" diameter barrel, eyepiece: 70x power
  • 45° star diagonal, 1.25" barrel, for viewing through the visual back
  • Moon filter for safe observation, especially during full phases
  • 8x21 straight-view finderscope
  • Smartphone holder
In the Box
Konus MotorMax-90 90mm f/13.3 Maksutov-Cassegrain Telescope with RA Motor
  • R.A. Tracking Motor
  • 9V Battery
  • 8x21 Finderscope
  • 45° Star Diagonal
  • Moon Filter
  • 10mm Plossl Eyepiece
  • 17mm Plossl Eyepiece
  • Aluminum Tripod
  • Smartphone Holder
  • Limited Two-Year Warranty
  • Table of Contents
    • 1Description
    Optical Design Maksutov-Cassegrain
    Aperture 3.5" / 90mm
    Focal Length 1200mm
    Focal Ratio f/13.3
    Eyepiece Barrel Diameter 1.25"
    Diagonal 45° star
    Finderscope 8 x 21 straight-view
    Tripod Two-stage aluminum
    Adjustable: 28.7 - 47.6" / 73 - 121 cm
    Mount Type German equatorial with RA motor
    Power Source 1 x 9 V battery, for RA motor
    Optical Tube Dimensions Not specified by manufacturer
    Weight Not specified by manufacturer
    Packaging Info
    Package Weight 19.5 lb
    Box Dimensions (LxWxH) 29.5 x 12.7 x 8.3"
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