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iOptron GoTo Mounting Systems
YOU ARE HERE >> HOME | i-OPTRON GoTo SYSTEM | i-Optron CEM25P 2" Steel Tripod

i-OPTRON CEM25P [ 2" Thick Steel Tripod ] - DISCONTINUED
Low Periodic Error GoTo Mounting System
xxxx + 18% GST
[ click to enlarge ]
[ click to enlarge ]
Actual Video of the Wooden Crate, Internal Box Packing and the i-Optron CEM25 Product
supplied by Tejraj & Co.
Special Thanks to Vineeth for making this VIDEO

Photos taken using the CEM25P GoTo
Heart Nebula M8 Region
M8 Region

  • Includes: Built-in 32-channel Global Positioning System (GPS)
  • PC/Laptop Controlled GoTo Mount
  • SPEED: 1×,2×,8×,16×,64×,128×,256×,512×,MAX(4º/sec)
  • 1,50,000 Object Database
iOptron's CEM25P GoTo Mount
The CEM25P has all of the features of the CEM25 and now has a guaranteed low periodic error of ~+/- 10 Arc seconds or less. The improved tracking accuracy is a product of tighter production tolerances. It also features larger gear switches on both axes, making access and adjustment easier especially with light gloves on. 

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

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 CEM25P 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.
  • 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
  • Low periodic error (< ± 10 arc seconds)
  • 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 adapter 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 2 inch heavy-duty stainless steel tripod (8kg)
  • Die-cast metal tripod spreader with accessory tray
  • Optional PowerWeightTM rechargeable battery pack
  • Optional StarFi WiFi adaper for full function control via SmartPhone/Tablet/Computer
What is Polar Alignment Routine ?
POLAR ALIGNMENT IF THE POLE STAR IS OBSTRUCTED (e.g. OBSERVING ON A S-FACING BALCONY!!!) Set up your scope on the floor (assuming it's reasonably level) in equatorial mode, with a rough guess at North. Put the tube into whatever 'home' position the instructions specify, or that you have chosen. Now choose an easily recognisable bright star at mid altitude. Pretend you HAVE polar aligned, and tell the scope to go to this star. When the slewing stops lift the scope very gently and turn the mount round till the star is in the centre of the field of view and you should have a fairly good polar alignment. If you are for example videoing planets and can also autoguide, this alignment may be all you need. But you can now refine it by the drift method if you need to - see
Computer Control
The CEM25P Mount can be controlled via ASCOM protocol (Windows OS), or directly by some software, such as Sky Safari (Mac OS).
Mount : Model:7102P
Center-Balanced Equatorial Mount
27 lb (12.3kg), exclude counterweight
Mount weight
10.4 lb (4.7kg)
Payload/Mount weight
Periodic error (PE) *
<±10 arcsec
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
Φ15.2mm, Brass
Motor drive
1.8º stepper motor, 128X microdivision
0.17 arc seconds
Synchronous belt
Latitude adjustment range
0º ~ 60º
Azimuth adjustment range
± 10º
Internal 32-channel GPS
Polar Scope
AccuAlign TM dark field illuminated
Level indicator
Level bubble
Hand Controller
Go2Nova® 8408 with 150,000+ objects database
Slew speed
Power consumption
0.35A(Tracking), 0.6A(GOTO)
Power requiremention
12V DC(9 ~ 15V), 1.5Amp
AC adapter
100V ~ 240V (included)
Power-down memory
Serial port
Yes (on hand controller)
Autoguide port
Firmware upgrade
PC computer control
Counterweight shaft
Φ20mm, Stainless Steel
10.4 lb (4.7kg)
2" Stainless Steel(8kg)
Dovetail saddle
Spring loaded Vixen-style
Operation temperature
-10ºC ~ 40ºC
Shipping weight
7120P: Mount Head (w/ tripod tray): 11.600 Kg
7122 : 2" Tripod (w/o tray): 6.350 Kg
Gross weight: 17.950 Kg.
Shipping Carton Dimension
mount Head: 35 x 35 x 20 cms3
2" Tripod: 102x 21x 18 cms3
Instructions for use in ENGLISH
Download Quick Start Guide in .PDF format
Download Instructions Manual in .PDF format
Download Firmware from Manufacturers Website
Official Product Webpage
Suggested Accessories with this Product
  • Padded Carry Bag for CEM 25P Mount. . . . Rs. 2100
  • Padded Carry bag for STAND . . . .Rs 1560
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