iOptron SmartStar-G-MC90 Blue 90mm Maksutov-Cassegrain OTA, Altazimuth "Cube" Mount, #8402A GoToNova Controller, Internal GPS, & Tripod

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iOptron SmartStar-G-MC90: Picture 1 regular $550.00

About iOptron SmartStar-G-MC90

SmartStar-G GPS AltAzimuth Telescope Mount, Astro Blue "The Cube" Alt-Azimuth Mount

The SmartStar-G comes with the patented Alt-Azimuth telescope mount, a.k.a." TheCube". This compact mount design is probably the most functional & 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

OTA's with dovetail connection & a weight limit of less than 11 lbs.(including finder scope & camera) are compatible with the SmartStarTM-G GPS AltAzi telescope mount. (If you do not have a dovetail connection, attach your OTA using mounting rings & dovetail available at your local telescope store or the OTA manufacturer)

The most easy to understand controller on the market
The GoToNova Controller is much easier to use than other similar products. The hand controller is more intuitive with menu categories better organized

It also has a larger LCD screen with more lines of content compared with the competition. Using the easy-to-use hand controller & its large LCD screen, you can easily set up your telescope & select where you want to go

More precise speed control for viewing objects
The control system also allows you to slew the telescope at 9 different drive

USB Port
The 8402 hand controller comes with a USB port that tremendously expands the functionalities of the already powerful system. With the USB2COM driver installed, the USB port works as an RS232 serial port. It supports firmware upgrades & computer control

With ASCOM protocol, you can control your telescope with most ASCOM compatible software. This enables you to utilize the CPU, large screen, & disk space of your PC/laptop. With a wide selection of software, your star gazing experience will never be the same again

Simply a better tripod
Made of 1-inch heavy-duty stainless steel the SmartStar Tripod is sturdy, elegant, & gives the user unparalleled stability during operation. Solid construction joints keep 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

With a database of 50,000 celestial objects, including all of the most famous galaxies, nebulae, star clusters, not to mention the planets, you'll be able to enjoy star gazing with the simple push of a button. Includes 32-channel GPS module.

iOptron SmartStar-G-MC90 Features

  • The SmartStar-G-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.
  • It has the magnification and light-gathering power of a refractor telescope fivetimes its size delivering large, clear images of celestial objects deep in the night-sky.
  • This light weight, ultra-compact scope offers a great combination of power and transportability, and brings stargazing to a whole other level.
  • All G-series telescope mounts come standard with a 32-channel GPS module for fully automated operation and alignment.
  • Simply turn on the GoToNova Controller and the GPS module will automatically synchronize your telescope location and time with the GoToNovaTM computerized control system.
  • View celestial objects without having to manually punch in the date, time, latitude or longitude
  • Compatible with most tubes on the market:
  • Schmidt-Cassegrains 8" and below
  • Maksutov-Cassegrains 150mm and below
  • Newtonian reflectors (if more than 40" may block tripod at certain spots)
  • Refractors (not more than 40")
  • OTA's with dovetail connection and a weight limit of less than 11 lbs. (including finder scope and camera) are compatible with the SmartStarTM-G GPS AltAzi telescope mount.
  • If you do not have a dovetail connection, attach your OTA using mounting rings and dovetail available from your OTA manufacturer
  • Heavy duty stainless steel tripod
  • AltAzimuth Telescope Mount The" Cube," The only mount of its kind for ultimate rotation
  • Includes the GoToNova Controller. The most intuitive controller on the market.
  • 50,000 object database plus 256 user-defined objects
  • The largest LCD screen on the market with 8 lines and 21-character Hand Control with backlit LED buttons.
  • USB Port for PC Laptop control and firmware upgrades (ASCOM protocol)
  • Drive motor with 9-speed setting for precise tracking
  • Dual-axis Servomotor
  • Standard-equipment AC connection (Optional DC adaptor available)
  • Payload: 7-11 lbs, depending on tubes and attachments

iOptron SmartStar-G-MC90 Specifications

AltAzimuth Mount
OTA Connection
Dual-Axis DC Servomotor, DC 12V
GoTo Controller
USB Port
Firmware Upgrade
PC Computer Control
32 Channel, Standard
50,000 Objects
7-11 lbs, depending on tubes and attachments
1" Stainless Steel
8 AA (not included)
Case Weight
10.56 lbs
Optical Design
Clear Aperature
Focal Length, Ratio
1200mm, f/13.3
Magnitude Limit
11.7th Magnitude
Dual-Axis, 9-Gear, Electronic (1×,2×,8×,16×,64×,128×,256×,512×,MAX)
Eye Pieces
K10, K20
Conversion Lens
REd Dot
GoTo System
GOTONova 50,000+ objects database
Mfr #

iOptron SmartStar-G-MC90 Reviews

Reviewed by 1 customers

(0 of 1 customers found this review helpful)


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from Pennsylvania  -  Casual/ Recreational

I bought this set up because it said it was good for Astrophotography. For starters when it came while unpacking the GPS glass fell out, the CD rom was all scratched up the finder scope was turned on and the eye piece prism that screws on to the scope came without threads making it impossible to use. I contacted IOPTRON about all the problems and after about a week they got back to me and sent replacement parts. After all that and trying it out for a couple days I was really sorry I bought it. The gps is almost impossible to get the scope to find objects right on. You can not level the tripod good enough with the bubble level. But I must say once locked on a star or the moon it tracks well. But with all the objects programed in the system the scope is only powerful enough to see a few! The focus is horrible! The tripod is not very sturdy. The only time I was happy is was when Adorama said they would let me send it back for a full refund! Thanks again Adorama!

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