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  • Regular price $3,678.00

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  • EC model adds integrated right ascension encoder and Real-time Periodic Error Correction (RPEC)
  • <0.25 arcsecond accuracy with its high-resolution RA encoder
  • Max payload 40 lbs
  • Mount head weight 17.4 lbs
  • Precision stepper motors
  • Integrated iPolar Electronic pole finder
  • Large and easy to use Quick-lock clutches
  • RPEC - Real-time Periodic Error Correction
  • Go2Nova 8407+ Controller with built-in heater
  • Built-in 32-channel GPS
  • Integrated ST-4 Auto-guide port
  • Self-centering saddle accepts Vixen or Losmandy style dovetails


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 0º ~ 60º(special CW shaft mounting if <10° )
Azimuth adjustment range ± 6º
Tracking accuracy (PE)** <0.25 arcsec rms
PEC Real-time PEC (RPEC)
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 Φ28 x 280mm SS 1.2KG
Counterweight 5KG (11lb)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 port ST-4
Communication port USB
WiFi External (optional)
Cable Management DC12V (3A), ST4,USB
Tripod LiteRoc 1.75" Stainless Steel, optional tri-pier
Hard case Included
Operation temperature -10ºC ~ 40ºC
Warranty Two year limited


  • CEM40EC Mount Head with High-resolution RA encoder
  • iPolar Electronic Polar Scope
  • Counterweight shaft
  • 11 lbs counterweight x 1
  • Go2Nova 8407 Hand Controller with cord
  • Hard Case for Mount Head
  • Tripod with 1.75" diameter legs (separate box)
SKU: C404A3