CEM40G (integrated iGuider)

SKU: C402AG3

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  • $2,539.00
  • Regular price $2,988.00

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The GEM45G and CEM40G are upgraded versions of the standard GEM45 and CEM40 that include a new Dual-Saddle with integrated iGuider guide scope. The iGuider is a 30mm f/4 lens with a 1/4" CCD with 3.75 um pixels and a built-in windows driver compatible with PHD auto guide software. The CEM40G also uses the wider diameter counterweight bar common to the GEM45 and CEM70.

  • Unique design, Center-Balanced equatorial mount (CEM) for maximum payload and minimum mount weight
  • Built-in iGuider guiding camera
  • Idea for both visual observation and astrophotography
  • Maximum payload of 40 lbs (18 kg) with the mount weight of only 17.4 lbs (7.9 kg)
  • All metal, CNC machined with red/black anodized
  • Easy to use quick-lock gear clutches
  • Integrated iPolarTM electronic polar finder
  • Low periodic error (< ± 7 arc seconds)
  • Permanent periodic error correction (PPEC)
  • Precision stepper motor for precise GOTO and accurate tracking
  • Go2Nova® 8407+ controller with Advanced GOTONOVA® GOTO Technology with built-in heater
  • Integrated ST-4 autoguiding port
  • 32-channel Global Positioning System (GPS)
  • USB communication port
  • Cable management system
  • 6" Losmandy D & Vixen dual dovetail saddle
  • LiteRoc 1.75 inch heavy-duty stainless steel tripod (7kg)
  • Hard case for mount head
  • Optional WiFi for mount control via SmartPhone/Tablet/Computer


Mount Center-Balanced Equatorial Mount
Max payload 40 lb (18 kg), exclude counterweight
Mount weight 17.4 lb (7.9 kg)
Payload/Mount weight 2.28
Structure Material All metal, CNC machined
Exterior Finish Anodized red/black
Latitude adjustment range 0° ~ 60° (special CW shaft mounting if <10°)
Azimuth adjustment range ± 6º
Tracking accuracy (PE) <±7 arcsec
Period 400 sec
Worm diameter Φ17mm, Brass
Right Ascension worm wheel Φ110mm, 216 teeth, zero backlash
Declination worm wheel Φ110mm, 216 teeth, zero backlash
Right Ascension axis shaft Φ45mm steel
Declination axis shaft Φ45mm steel
Right Ascension bearings Φ68mm
Declination bearings Φ68mm
Counterweight shaft Φ28X280 mm, Stainless Steel (1.2 kg)
Counterweight 11lbs (5kg)X1
Motor Precision stepper motor, 1.8º/128X micro-step
Motor resolution 0.08 arcsec (200 PPS)
Transmission Synchronous belt
Hand Controller Go2Nova® 8407+, 8 line 21 character LCD
Star Database 212,000+, star identification
Power DC 12V, 5A (5.5mm/ 2.5mm plug)
AC adapter 100V ~ 240V (included)
Power consumption 0.6A(Tracking), 0.9A(GOTO)
Power-down memory Yes
Polar scope Internal iPolar TM electronic polar scope
Meridian treatment Stop (0-10° pass), flip
Zero position Automatic zero search
Dovetail saddle 6" Losmandy D & Vixen
Max slew speed 4.5°/sec (1080x)
Guiding scope/camera Built in guiding scope and camera, iGuiderTM
Guiding port ST-4
Communication port USB
WiFi External (optional)
Cable Management DC12V (3A), ST4,USB
Tripod LiteRoc 1.75" Stainless Steel(7kg)
optional tri-pier
Hard case Included (Mount head)
Operation temperature -10ºC ~ 40ºC
Warranty Two year limited
  • CEM40G Mount Head
  • Hard Case for Mount Head
  • iPolar Electronic Polar Scope
  • iGuider Auto guider saddle-integrated camera
  • Counterweight shaft
  • Go2Nova 8407 Hand Controller with cord
  • 11 lbs counterweight x 1
  • Tripod with 1.75" diameter legs