iOptron CEM120

Name: iOptron CEM120
Brand: iOptron
SKU: 32
Price: 5890 EUR
Availability: InStock

5 890,00 €

TTC

iOptron CEM120 — 52 kg centre-balanced observatory mount The iOptron CEM120 (#7300) is iOptron's observatory-class centre-balanced equatorial mount. At 26 kg, it carries payloads up to 52 kg excluding counterweights, ideal for large telescopes and complex imaging arrays on a permanent pier.

Manufacturer model: iOptron CEM120 (#7300) · Specifications checked against manufacturer data on 2026-11-03

iOptron CEM120 — 52 kg centre-balanced observatory mount

The iOptron CEM120 (#7300) is iOptron's observatory-class centre-balanced equatorial mount. At 26 kg, it carries payloads up to 52 kg excluding counterweights, ideal for large telescopes and complex imaging arrays on a permanent pier.

Precision drive

Huge 216 mm, 360-tooth worm wheels on 80 mm steel axles and 125 mm bearings provide stability and smooth motion. iOptron specifies periodic error under ±3.5 arcseconds over the 240-second worm period, with permanent periodic error correction. Encoder-equipped CEM120EC/EC2 versions reach under 0.15 arcseconds RMS.

Built for remote operation

Along with RS232 and USB, the CEM120 adds built-in Wi-Fi and LAN for remote operation. An extensive cable-management system routes 12 V power, USB 2.0 and USB 3.0, ST-4 and AUX connections through the mount to prevent tangles. Precision altitude and azimuth adjusters have 0.5 arcminute and 3 arcminute divisions.

Mount

Design	Centre-balanced equatorial (CEM)
Payload	52 kg, excluding counterweight
Mount weight	26 kg
Latitude range	0–68° (0.5 arcmin divisions); low-latitude CW shaft below 10°
Azimuth adjustment	±5° (3 arcmin divisions)
Periodic error	Under ±3.5 arcsec (encoder-measured, 240 s); PPEC
Worm gears	216 mm, 360 teeth, zero backlash; 26 mm worm
Axes	80 mm steel; 125 mm bearings
Resolution	0.07 arcsec
Maximum slew	About 4°/s
Saddle	Losmandy D, 437 mm, spring-loaded
Counterweight shaft	38 × 540 mm stainless steel, anti-slip
Counterweight	10 kg
Mount base	210 × 230 mm

Electronics and power

Hand controller	Go2Nova 8410, 212,000+ objects
Polar scope	Optional iPolar
Ports	RS232, USB, LAN, Wi-Fi; ST-4; GPS
Cable management	2 × DC 12 V (1 A), 2 × DC (5 A), ST-4, 2 × USB 2.0, 3 × USB 3.0, AUX
Meridian handling	Stop (0–14° past), automatic flip
Power	12 V DC, 5 A; 100–240 V AC adapter included, indoor use only
Consumption	0.7 A tracking; 1.8 A GoTo
Operating temperature	−10 to +40 °C
Pier	Optional

Standard manufacturer package

CEM120 mount head
Go2Nova 8410 hand controller and cable
10 kg counterweight and stainless counterweight shaft
12 V 5 A AC adapter (100–240 V)
4 base mounting screws; GPS and Wi-Fi external antennas

Manufacturer documentation

iOptron CEM120 product page · CEM120 instruction manual

Compatibility notes

Standard CEM120 #7300 (PPEC), not CEM120EC/EC2 (encoder, <0.15 arcsec RMS). iPolar optional. Pier not included. Low-latitude CW (#7326LL) needed below 10 deg.

Additional specifications

Latitude range (°)	0–68
Azimuth adjustment (°)	±5
Periodic error	<±3.5 arcsec, PPEC
Worm period (s)	240
Axis shafts bearings	80 mm steel; 125 mm bearings
Resolution (arcsec)	0.07
Max slew	~4 deg/s
Cw shaft	38 x 540 mm SS anti-slip
Counterweight (kg)	10
Mount base (mm)	210 x 230
Consumption	0.7 A tracking; 1.8 A GoTo
Polar scope	Optional iPolar
Operating temperature (°C)	-10 to 40

Fiche technique

Gestion des câbles: 2xDC12V 1A, 2xDC 5A, ST4, 2xUSB2.0, 3xUSB3.0, AUX
Référence fabricant: 7300
Type de monture: Centre-balanced equatorial
Poids de la monture (kg): 26
Pack: Head; Go2Nova 8410 + cable; 10 kg CW; CW shaft; 12V5A adapter; 4 base screws; GPS and Wi-Fi antennas
Charge (kg): 52
Ports: RS232, USB, LAN, Wi-Fi, ST-4, GPS
Alimentation: 12 V DC 5 A
Selle: Losmandy D, 437 mm
Roues dentées: 216 mm, 360 teeth; 26 mm worm

Références spécifiques

MPN: 7300

Téléchargement

CEM120 instruction manual

Téléchargement (2.52MB)

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