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iOptron CEM40G Center Balance EQl Mount with iGuider, Hard Case, and 1.75" LiteRoc Tripod

(7 Available)
Free shipping
SKU: IOP-C402AG3
$2,988.00

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iOptron CEM40G Center Balance Equatorial Mount with iGuider and Hard Case

The iOptron CEM40G is the G version of the popular CEM40 mount! The G version comes with an onboard guiding camera called the iGuider. The iGuider from iOptron is made of a 30mm F4 lens and a 1/4 CCD with 3.75 um pixels. The lens and sensor are all conveniently tucked away in the mount saddle. This version comes with a standard dual saddle, a single USB cable connection for your computer from the cable management system and it also includes the iPolar!

Traditional equatorial mounts are wonderful for both visual astronomy and astrophotography, but users have had to grapple with the fact that the design, where the position of the telescope is offset from the center of the tripod, causes torque that effects the mount's overall stability. The iOptron CEM, or Center Balance Equatorial Mount, puts the mount's balance point directly over the tripod, resulting in greater stability and allowing for a better weight capacity to mount weight ratio. This iOptron mount design is one of the reasons why the CEM40 mount head can weigh just 15.8 pounds but carry up to 40 pounds!

Features of the iOptron CEM40G Equatorial Mount

The CEM40 is CNC machined and anodized for precision and beauty, and comes with an internal cable management system that keeps wires and cables neatly inside the mount to avoid snags. The quick-lock gear clutch drive engagement system has large levers for easy adjustment even when wearing gloves.

GoTo capabilities are facilitated by the iOptron GoTo Nova 8407+ hand controller, which, among other things, has a built-in heater and a whopping 359,000 object library with star identification. The CEM40 includes low power consumption stepper motors with 0.08 arc seconds of resolution and a built-in 32-channel GPS quickly and easily locates your mount's position. The included PPEC, or Permanent Periodic Error Correction, allows you to train your mount for heightened accuracy.

iOptron CEM40G Specifications

  • Mount: Center Balanced Equatorial
  • Maximum Payload: 40 pounds (18 kg), excluding counterweight
  • Mount Weight: 15.8 lb. (7.2 kg)
  • Payload to Mount Weight Ratio: 2.5
  • Material: All metal, CNC machined
  • Exterior Finish: Anodized red and black
  • Latitude Range: 0-60 degrees (optional shaft for <10 degrees available)
  • Azimuth Range: +/- 6 degrees
  • Tracking Accuracy: < +/- 7 arcseconds, measured with encoder at 400 seconds
  • PEC: PPEC
  • Period: 400 seconds
  • Worm Diameter: 17mm, Brass
  • RA Worm Wheel: 110mm, 216 teeth, zero backlash
  • Dec Worm Wheel: 110mm, 216 teeth, zero backlash
  • RA Axis Shaft: 45mm steel
  • Dec Axis Shaft: 45mm steel
  • RA Bearings: 68mm
  • Dec Bearings: 68mm
  • Mount Base Diameter: 125mm
  • Motor: Precision stepper motor, 1.8 degrees/128 micro-step
  • Motor Resolution: 0.08 arctic (200 PPS)
  • Hand Controller: Go2Nova 8407+, with an 8 line, 21 character LCD screen
  • Star Database: 359,000+ with star identification
  • Power: 12V DC, 5A AC Adapter w/2.5mm plug
  • AC Adapter: 100V ~ 200V
  • Power Consumption: 0.6A when tracking, 0.9A during GoTo
  • Polar Scope: iGuider and iPolar
  • Meridian Treatment: Stop (0-10 degrees pass)m, flip
  • Zero Position: Automatic zero search
  • Dovetail Saddle: Dual Vixen/Losmandy saddle
  • Max Slew Speed: 4.5 degrees per second (1080X)
  • PEC: PPEC
  • Communication Port: USB
  • GPS: Yes
  • Cable Management: DC12V (3A), ST4, USB
  • Tripod: 1.75" LiteRoc Tripod
  • Hard Case: Yes


This mount is additionally compatible with the iOptron 900 mm Permanent Pier (IOP-8038-900) when used in conjunction with the iOptron Mini Pier Tripod Extension (IOP-8032) or iOptron 6" Pier Top Plate (IOP-8032-PT) for those looking for a pier solution (pier, mini pier, and top plate sold separately).