iOptron - SmartStar-E-MC90 Maksutov-Cassegrain Telescope

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The iOptron SmartStar® CubeTM-E-MC90 telescope system is the ideal choice for deep space viewing and astrophotography.

SKU: IOP-8504B
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Product Description


The iOptron SmartStar® CubeTM-E-MC90 telescope system is the ideal choice for deep space viewing and astrophotography. This 90mm-diameter Maksutov-Cassegrain Telescope dramatically reduces the chromatic aberration that plagues its Refractor counterparts and has a focal length of 1200mm. This light weight, ultra-compact scope offers a great combination of power and transportability, and brings stargazing to a whole other level.


Alt-Azimuth Mount– The Cube™

The SmartStar® CubeTM-E-MC90 comes with iOptron's patented Alt-Azimuth telescope mount, a.k.a. The Cube™.This compact mount design is probably the most functional and flexible unit on the market. Both axis motors are built into a small single unit which is universally compatible with all telescopes using a dove-tail connection. In addition, there are no “dead spots” – so you can point your telescope to ANYWHERE above the horizon, whereas, other mounts block the telescope tube at certain points of rotation. This mount also comes standard with AC connection. An optional DC adaptor is available so you can plug your telescope motor into your car if you’re camping or at any remote location


The most easy to understand controller on the market

The GoToNova® Controlleris much easier to use than other similar products. The hand controller is more intuitive with menu categories better organized. It also has the largest LCD screen on the market with 4 lines of content compared with others that only have 2 lines. Using the easy-to-use hand controller, you can easily set up your telescope and select where you want to go.


More precise speed control for viewing objects

The control system also allows you to slew the telescope at 5 different drive speeds, keeping the object within the telescope’s viewfinder for as long as you wish.


Stainless Steel Tripod

Made of 1-inch heavy-duty stainless steel the Cube™ Tripod is sturdy yet elegant, and gives the user unparalleled stability during operation. Solid construction joints keep your mount locked securely. With an all-metal support system your valuable telescope will keep still even on a windy night.


GoToNova® Computerized Control System

The revolutionary GoToNova® computerized control system is by far the most technologically advanced automated tracking system available on the market today.



  • 90mm Maksutov-Cassegrain telescope
  • 1200mm Focal Length
  • Red Dot finderscope for locating objects
  • Heavy duty stainless steel tripod
  • Alt-Azimuth Mount– The Cube™-- The only mount of its kind for ultimate rotation
  • Includes the GoToNova® Controller. The most intuitive controller on the market.
  • 3,500+ object database plus 128 user-defined objects
  • The largest LCD screen on the market with 4 lines and 21-character Hand Control with backlit LED buttons.
  • Drive motor with 5-speed setting for precise tracking
  • Dual-axis Servomotor
  • Standard-equipment AC connection (Optional DC adaptor available)
  • GPS-compatible with optional GPS Module (#8411)







Name iOptron - SmartStar-E-MC90 Maksutov-Cassegrain Telescope
Manufacturer iOptron
Model IOP-8504B
Telescope Aperture 3.1" - 4"
Aperture 90 mm
Batteries AA x 8(Not Included)
Eyepieces 10mm and 20mm
Finderscope Red Dot (with 3V lith cell CR2032 battery)
Focal Length 1200 mm
Focal Ratio f/13.3
Mount AltAzimuth
Optical Design Maksotov-Cassegrain
Resolution 1.3”
Tripod 1” Stainless Steel


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