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iOptron CEM40EC Mount with 1.75-inch LiteRoc Tripod

SKU : IO-7403ECA

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  • iOptron CEM40EC Mount with Integrated iPolar Electronic Polar Finder 
  • Go2Nova 8407 and Hand Controller   
  • 32-channel GPS 
  • Cable Management System   
  • iOptron Universal Saddle   
  • 1.75-inch LiteRoc Tripod   
  • Hard Case
  • 10-pound Counterweight 
  • iOptron Two-year Limited Warranty

Product Details

  • The iOptron CEM40EC mount with integrated + iPolar and 1.75-Inch LiteRoc Tripod is the next generation of Center-balanced Equatorial Mounts.

    Weighing in at only 15.8-pounds, this mount can support a payload of up to 40-pounds.

    This mount also has an Integrated Electronic Polar Finder Scope known as the iPolar. This tool ensures the accurate alignment of a telescope, even when the pole star is obscured. There are Large Levers on the quick-lock drive engagement system; these large levers make it easy to snap the gears into place.

    Innovative Technology: Make way for an innovative mount! This iOptron CEM40EC mount uses iOptron's patent-pending Universal Self-Centering Saddle (USCS). This saddle accommodates Losmandy and Vixen-style dovetail plates. The CEM40EC also uses iOptron's ultra-quiet, low-power consumption stepper motor drive system, aiding the mount in providing precise tracking.

    Computerized Mount Features:  The iOptron CEM40EC mount uses the Go2Nova 8407 hand controller to navigate the night sky. This incredible technology helps observers find celestial objects with the aid of the mount's 212,000+ object database!

    With the included tripod, 10-pounds counterweight, and the mount's computerized technology, observers are just an OTA away from a spectacular viewing experience!

    iOptron SKU: C404A3

    • Unique design, Center-Balanced equatorial mount (CEM) for maximum payload and minimum mount weight
    • Idea for both visual observation and astrophotography
    • Maximum payload of 40 lbs (18 kg) with the mount weight of only 15.8 lbs (7.2 kg)
    • All metal, CNC machined with red/black anodized
    • Easy to use quick-lock gear clutches
    • Integrated iPolarTM electronic polar finder
    • Low periodic error ( PE< 0.25 arc seconds RMS)
    • Real-time periodic error correction with high-resolution encoder (RPEC)
    • Precision stepper motor for precise GOTO and accurate tracking
    • Go2Nova® 8407+ controller with Advanced GOTONOVA GOTO Technology with a built-in heater
    • Integrated ST-4 autoguiding port
    • 32-channel Global Positioning System (GPS)
    • USB communication port
    • Cable management system
    • New, patent-pending iOptron universal saddle
    • 1.75-inch LiteRoc tripod
    • Hard case included
    • Optional WiFi for mount control via SmartPhone/Tablet/Computer
  • specifications

    Database212000 Plus Objects
    DEC Worm Wheel110mm Diameter 216 Teeth
    Drive TypePrecision Stepper Motor/ 1.8 Deg/ 128x MicroStep
    Encoder Resolution0.08 arcsec (200 PPS)
    Encoder TypeEQ North and EQ South
    Free ShippingYes
    Head DesignEquatorial
    Instrument Capacity40 lb
    Latitude Range0 to 60 Degrees
    Mount Head Weight15.8lb
    Pointing Accuracy6 Arcseconds
    PortsAutoguide ST 4
    PortsUSB Communication
    RA Worm Wheel110mm Diameter 216 Teeth
    Slew Speed4.5 Deg/sec (1080x)
    Telescope ConnectionDual Vixen & Losmandy
    Tracking Accuracy<0.25 Arcseconds
    Tracking RatesGoTo 0.9ArcSec
    Tracking RatesTracking 0.6ArcSec
    Tripod Weight7.6 lb
  • included items

    • iOptron CEM40EC Mount with Integrated iPolar Electronic Polar Finder 
    • Go2Nova 8407 and Hand Controller   
    • 32-channel GPS 
    • Cable Management System   
    • iOptron Universal Saddle   
    • 1.75-inch LiteRoc Tripod   
    • Hard Case
    • 10-pound Counterweight 
    • iOptron Two-year Limited Warranty

Product Reviews

Customer Reviews
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Gilbert I.
United States United States

Great little mount

I can get 0.7 arcsecond RMS guiding for payloads from 5 lbs. to 40 lbs. with this mount. The EC compensates for the wide range of payloads as long as you start with the mount in perfectly balanced in 3 axis. You do have to forget all your experiances with other mounts because they don't apply. For example, the left-right balance is hard to setup with many guide scope mountings, and you don't want to have frequent guiding commands.

Frank R.
United States United States

From CEM25-EC to CEM40-EC

Wow. I liked my little CEM25-EC and got some great results with it, but this thing is a generation newer—and better. Everything feels crisp and tight and professional, unlike the smaller one that had some quirks and weak points. I got some great unguided exposures from the CEM25-EC as long as I got a good polar alignment—but the iPolar on this makes that a snap and thought I’ve only gotten a few clear nights to try it, the tracking is consistently good. When guiding, the PHD2 graph looks like it’s not working very hard. The go-to seems better (I’m always allowing for my own ineptitude) and the hand controller is a definite step up. I appreciate that we can plug a USB cable directly into the mount. . .but why are we still using plastic phone plugs on the hand controller? Sheesh. But that’s a small point. The USB2 port at the back of the saddle is handy, though I wish it were USB3 to match my ZWO cameras. The 12v supply is only 3 amps which is a necessity for the ASI2600 cooler, but so far it’s working fine (in moderate temps). The cable management system baffles me me—how do you get a cable down that teeny hole? But it helps a little. The new tripod seems every bit as stable as my old 2-inch iOptron tripod. The thumbscrews are a little awkward, but work fine. BUY THE MINI-PIER!!! It’ll keep you out of the cardiac ward. Apparently iOptron’s logic dictates that the RA axis does it’s job before the Azimuth axis moves. This means your camera is in danger of hitting a tripod leg, especially if you have a long rig like my TeleVue np101is. I actually did that a couple of times on the little mount, the CEM25-EC, and I’m not sure it’s impossible with the mini-pier (on either mount). But it’s a good start. Overall: it’s a great mount. It’s not as small and the CEM25-EC but still easily transportable and I can’t imagine the situation where I would prefer the little mount instead of it. The performance is superb (so far: 4 times out) and it’s a pleasure to use. Still quiet, though not as quiet as the little one. Feels more solid, though I never really had a problem with vibrations on the other one. My overall view is that there’s no reason to buy the older, smaller mount any more. Yes, this one is more expensive but the improvements make it worth it.