Name: iOptron CEM120EC Equatorial Mount with Encoders (7301)
SKU: 94781

iOptron CEM120EC

Recognizing the growing demand for an accurate and stable, equatorial mount with the versatility to carry larger instruments and more complex imaging arrays, we created the iOptron CEM120EC. It offers the benefits of our revolutionary “center balance” design: stability, accuracy, and smooth mechanical operation, while capable of carrying a payload up to 115 lbs (52 kg). The “center balance” design’s natural stability is due to its focusing the mount along with payloads weight directly over the center of the pier or tripod.

The CEM120EC's performance is demonstrated by its low periodic tracking error of <0.15 arcsec RMS. Along with the stability aspect, the CEM120EC features an advanced cable management system consisting of more ports in more locations preventing tangle ups and reducing the chance of fractured cables. It also adds some new features to the CEM family like Wi-Fi and LAN for remote operation and easy to use, reliable clutches on both axes.

Optional heavy duty Tri-Pier 360 and Permanent Pier are available for order.

Optional Tri-Pier adapter for light weight payload ( 8036-120) is also available. It can be modified for permanent pier mounting.

Features

A new design, center-balanced equatorial mount (CEM) for maximum payload with natural stability
Observatory astrophotography mount ideal for both visual and Astro-photographers
Payload of 115 lbs (52 kg) with the mount weight of 57 lbs (26 kg)
Easy to use and reliable gear clutches
Precision altitude and azimuth adjustment.
Precision stepper motor with 0.07 arcsec accuracy for precise GOTO and accurate tracking
Polar alignment routine for those who can't see the Pole Star
Go2Nova® 8407 V2 controller with Advanced GOTONOVA® GOTO Technology with built in heater
High precision tracking with low periodic error (PE)<0.15 arcsec RMS
Real time periodic error correction (RPEC)
32-channel Global Positioning System (GPS)
Built-in WiFi and LAN for remote operation
Integrated ST-4 autoguiding port
Advanced cable management system with more choices
Spring loaded, individual adjustable Losmandy saddle

Technical Specifications

Mount	Center-balanced Equatorial Mount (CEM)
Payload¹	52kg (115 lbs), exclude counterweight
Mount weight	26kg (57 lbs)
Payload/Mount weight ratio	2
Material	All metal
Latitude adjustment range²	0°~ 68° (0.5 arcmin division)
Azimuth adjustment range	± 5° (3 arcmin division)
PE (by encoder)³	< 0.15 arcsec RMS
Worm period	240 sec
PEC	Real time PEC (RPEC)
Right Ascension worm wheel	Φ216mm, 360 teeth, zero backlash
Declination worm wheel	Φ216mm, 360 teeth, zero backlash
Worm	Φ26mm
Right Ascension axle	Φ80mm, steel
Declination axle	Φ80mm, steel
Right Ascension bearings	Φ125mm
Declination bearings	Φ125mm
Counterweight shaft	Φ38.1x 540 mm (SS, anti-slip, 4.5kg)
Counterweight	10 kg (22 lbs)
Mount base size	210 x 230 mm
Motor drive	Precision stepper motor w/128 micro-step
Encoder Resolution	0.035 arc seconds
Motor Resolution	0.07 arc seconds
Slew speed	4°/sec (960x) max.
Hand Controller	Go2Nova® 8407 V2, 8 line 21 character LCD
Power requirement⁴	DC 12V, 5A
Power consumption	0.7A(Tracking),1.8A(GOTO)
Polar Scope	Optional electronic polar scope
Meridian treatment	Stop (0-14° pass), auto flip
Zero position	Automatic zero search
Park position	Horizontal, vertical, current, alt/azi input
Level indicator	YES
Dovetail saddle	Losmandy D, 17.2" (437mm)
GPS	YES
Guiding port	ST-4
Communication port	RS232, USB, LAN, WiFi
Cable management	2xDC12V (1A), DC5V(1A), 2xDC (5A), ST4, 6P6C, 4xUSB2.0, USB3.0 (powered), USB for PS, AUX
Operation temperature	-10°C ~ 40°C
Pier/Tripod	Optional pier
Warranty	Two year limited