CEM25EC Mount with Optional Accessories (7103EC)
CEM25EC Mount with Optional Accessories (7103EC)


CEM25EC Mount with Optional Accessories (7103EC)

Regular price
$ 1,899.00
Sale price
$ 1,899.00
Unit price

This item is out of stock but you can place an order now and we’ll ship when it becomes available.


A Mount with PE Less Than 0.3 arcsec rms under $2000 - The New CEM25EC!

Center-balanced Equatorial Mount, a mount whisper quiet and light weight! The mount uses up to 60% less GOTO power consumption than other mounts in category.

With high precision optical encoder system and advanced control technology, the CEM25EC will track a star at a periodic error less than 0.3 arc second, the only mount under $2000!

The "Z" design mount puts the weight of the payload at the center of gravity allowing for greater natural stability. Given its payload capacity, this means the "Z" designed mount is unusually light. A nice benefit when setting up at a remote site. Other features include an adjustable counterweight bar to prevent obstruction with the tripod. And polar aligning is quick and accessible all the time since the polar scope is not blocked by the declination shaft.

The CEM25 is equipped with the latest advanced GOTONOVA® GOTO technology, making it one of the most powerful and accurate GOTO mounts available. Its database includes over 150,000+ objects. The Go2Nova® Hand Controller is intuitive to use and its large 4-line LCD screen simplifies the process of setting telescopes and locating objects.

The mount comes standard with 1.5" heavy duty stainless steel tripod and a hard carrying


      • A new design Center-Balanced equatorial mount for maximum payload and minimum mount weight
      • Specialized astrophotography mount ideal for entry-level and intermediate Astro-photographers
      • High precision optical encoder system and advance control technology for accurate tracking
      • PE<0.3 arc second RMS
      • Payload of 27 lbs (12.3 kg) with the mount-only weight of 10.4 lbs (4.7 kg)
      • Spring loaded gear system with customer adjustable loading force
      • Gear switches on both R.A. and DEC axes for easy balancing when disengaged
      • Adjustable counterweight shaft for 0º latitude operation
      • Stepper motor with low power consumption
      • New electronics and control adapted from CEM60
      • iOptron AccuAlignTM calibrated polar scope with dark-field illumination and easy polar alignment procedure, allowing for fast and accurate polar alignment
      • Polar alignment routine for those who can’t see the Pole Star
      • Go2Nova® 8408 controller with Advanced GOTONOVA® GOTO Technology
      • Integrated ST-4 autoguiding port
      • Built-in 32-channel Global Positioning System (GPS)
      • Serial port for firmware upgrade and computer control
      • Spring loaded Vixen-style saddle
      • Standard 1.5 inch heavy-duty stainless steel tripod (5kg), optional 2 inch tripod (8kg)
      • Die-cast metal tripod spreader with accessory tray
      • Hard case included
      • Optional PowerWeightTM rechargeable battery pack
      • Optional StarFi WiFi adapter for full function control via SmartPhone/Tablet/Computer,



      Center-Balanced Equatorial Mount


      27 lb (12.3kg), exclude counterweight

      Mount weight

      10.4 lb (4.7kg)

      Payload/Mount weight


      Right Ascension worm wheel

      Φ88mm, 144 teeth aluminum

      Declination worm wheel

      Φ88mm, 144 teeth aluminum

      Right Ascension axis shaft

      Φ35mm steel

      Declination axis shaft

      Φ35mm steel

      Right Ascension bearing

      Φ55mm ball bearing

      Declination bearing

      Φ55mm ball bearing

      Worm gears


      Motor drive

      1.8 º stepper motor, 128X microdivision


      0.14 arc seconds


      Synchronous belt

      Latitude adjustment range

      0º ~ 60º

      Azimuth adjustment range

      ± 10º


      Internal 32-channel GPS

      Polar Scope

      AccuAlignTM dark field illuminated

      Level indicator

      Level bubble

      Hand Controller

      Go2Nova® 8408with 150,000+ objects database


      Real Time PEC

      Periodic Error

      <0.3 arcsec RMS





      Counterweight shaft



      10.4 lb (4.7kg)


      1.5" Stainless Steel(5kg), optional 2"(8kg)

      Dovetail saddle

      Spring loaded Vixen-style

      Power consumption


      Power requirement

      12V DC(9 ~ 15V), 1.5Amp

      AC adapter

      100V ~ 240V (included)

      Serial port

      Yes (on hand controller)

      Autoguide port


      Firmware upgrade


      PC computer control

      Yes (ASCOM)

      Operation temperature

      -10ºC ~ 40ºC


      Two year limited

      Please pay attention to the operation differences between the ZEQ25 and CEM25 mount, especially the Zero Position and Tension Adjuster.

      Quick Start Guide
      Instruction Manual

      Download Latest Firmware

      iOptron Telescope ASCOM Driver:
      Install ASCOM Driver and Commander

      Personal Upgrade Path

      Buy risk-free: When it’s time to trade up you’ll get the most value for your used gear.