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Mountings & accessories > Mountings > Equatorial with GoTo > iOptron > CEM > iOptron Mount CEM70G GoTo
( 3 / 5 )
Product no.: 66887

Mount CEM70G GoTo

RRP: $ 5,200.00 Our price:
$ 4,320.00 incl. VAT, plus shipping costs
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Express shipment possible for delivery tomorrow, 30.03.2024!
This product is available in the following variants:
Autoguiding Price
iGuider $ 4,320.00
no $ 3,990.00

Product description

More about the series CEM...

Similar to illustration. (tripod not included in delivery)

Following the great success of the CEM60, iOptron is launching a new mount in this size class that offers even more innovations!

The new CEM70 comes with the characteristic appearance of the tried and tested CEM mount. CEM stands for centre-balanced equatorial mount. This design allows a particularly favourable ratio of load capacity to weight of mount. In the case of the CEM70, the ratio is 2.3. So the mount carries more than twice its own weight! This makes the CEM70 suitable for mobile applications, but is also a very good mount for observatories.

The stepper motors and the toothed belt drive allow high pointing accuracy in GoTo mode, and most importantly, a very precise tracking accuracy with a periodic error of less than +/- 3.5 arc seconds - and all that with the usual quiet operation of all iOptron mounts.

The CEM70 is available in two versions:

In addition to the features mentioned above, the standard version offers:

  • Integrated iPolar camera. This camera replaces the classic polar finder and allows convenient, precise alignment using a laptop
  • Stepper motors (1.8° with 128 microsteps) for precise pointing and tracking
  • Go2Nova 8407 hand controller with built-in heater to prevent condensation on the large display
  • 32 channel GPS: the computer controller always knows where it is and already knows the date and time for GoTo initialisation
  • Advanced cable management with connectivity options for accessories
  • Dual mount saddle for Vixen- and Losmandy-standard dovetail plates. With a length of 20 centimetres, the saddle safely holds even heavy optics!
  • Rotary knobs are large and easy to use with gloves

Both versions of the CEM70 can be connected to an autoguider over a ST-4 interface. This enables precis tracking control for long-exposure images.

The CEM70G version has also an integrated autoguider, the new iGuider from iOptron! With this version of the CEM70, a separate autoguider solution is no longer necessary!

In addition, only the CEM70G version offers a built-in WLAN (WiFi) and a fast USB 3.0 interface for communication with an external computer (PC or laptop). With the CEM70G, astrophotographers can look forward to an extremely powerful tool that leaves nothing to be desired, even when it comes to payload.

Both versions of the CEM70 are supplied in a sturdy transport case.

Our expert comment:

If there are small discrepancies when the “zero position” is first activated, iOptron has provided advice to resolve this:

"Search zero position is a function to bring the mount to a rough zero, a few degrees off is possible. At the end of Search Zero, it will ask calibration. Use arrow keys to move RA and DEC to adjust the positions to physical zero position. When done, set zero position. This position will be memorized in the controller as Zero Position.

One may further refine zero position by the following steps:

Search zero -> goto a bright star and center it ->sync to target -> goto zero position ->set zero position.

This is a true (accurate) zero position."

(Jan Ströher)

Specifications

Capacity


Designation
CEM70
Max. additional load capacity (kg)
31
Weight mount head only (kg)
13,6
Counterweight(s) (piece)
1 (9,5kg)
Interfaces
USB 2.0
Power supply
12
Language
English
Polar elevation setting (°)
0 - 65
Slow-motion azimuth adjustment (°)
+/- 4
Operating temperature
(-20) - (+45)
Motor speeds
1x, 2x, 8x,16x, 64x, 128x, 256x, 512x, max ~3.75º/sec
Mounting saddle
Losmandy & Vixen
DEC ball bearings diameter (mm)
80
RA ball bearings diameter (mm)
80
DEC worm gear diameter (mm)
151
RA worm gear diameter (mm)
151
Worm gear teeth (DEC) (piece)
248
Worm gear teeth (RA) (piece)
248
Encoder
no
Precision of tracking
+/- 5
RA worm shaft diameter (mm)
55
DEC worm shaft diameter (mm)
55
Material of worm gear
Steel
Diameter of counterweight bar (mm)
28
Motor type
Stepper motors
Cable-guide
internal

Special features


GoTo system
yes

Equipment


Transport cases
yes
Tripod <p>
without tripod
Pole finder
yes
Power pack
yes

General


Total weight (kg)
21,8
Series
CEM
Type
Mount
Type of build
Equatorial

Area of application


Useful for photographs
yes

GoTo control


GPS
yes
with hand paddle
yes
Software
Go2Nova 8407
WIFI
yes
Interfaces
Autoguider, USB
Autoguiding
iGuider
PEC correction
yes
Polar Alignment
iPolar

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*All prices include VAT plus shipping costs.

iOptron Mount CEM70G GoTo
Connections

Customer reviews

Touchy performance, not a hassle-free mount

Review by mxpwr on 30.04.2023 19:33:58

( 3 / 5 )

The mount has mostly a good build quality, with some exceptions (such as a somewhat lose USB jack). The design is pretty well thought through, though the tripod mounting screws are really fiddly.
The USB connection is really touchy, only works stable with certain cables and PCs; be prepared to test around a bit.
Telescope alignment is a breez, very easy to setup.
The main issue of the mount is with the tracking/guiding which is a big hit and miss. Not what i expect from a mount on this price class. Some intrinsic backlash (probably in the meshing) causes lots of issues with the slightest misalignment, sich as increased Ra jitters and oscillations, which need to be dealt with carefully. On a good day rms of 0.5" can be reached.
(The Astroshop customer service was kind enough to check for mechanical errors, but none could be found.)


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