Astronomy Specialist




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Testar Australia inspects and tests used/demo instruments and guarantees its quality. This SkyWatcher AZ-EQ6 is in excellent cosmetic condition and works perfectly.

  • All photos reflect the real condition of the item and are not taken from catalogues. What you see is what you get.
  • Every second hand/demo item is guaranteed with a 12 months warranty against defects.

This used mount has been tested in real conditions under the sky. We guided a real star using a 600mm telescope and a guiding camera obtaining a pixel scale of 1" in order to verify the quality of the mount and the tracking accuracy. The minimum guiding time is 30 minutes that is sufficient to highlight and collect the periodic error and average the RMS. Then, we compare the tracking accuracy with the data obtain from other mounts to verify if the performance is in the norm.


Guiding time 70 minutes
Telescope used
SkyWatcher Evostar ED80 (F.600mm)
Periodic error 15.2"
Total RMS tracking accuracy
Right Ascension RMS tracking accuracy 
Declination RMS tracking accuracy  0.53"
PHD2 Tracking info Guiding Begins at 2020-11-03 22:14:30
Equipment Profile = ED80/600 + ASI 290
Dither = both axes, Dither scale = 1.000, Image noise reduction = none, Guide-frame time lapse = 0, Server enabled
Pixel scale = 1.00 arc-sec/px, Binning = 1, Focal length = 600 mm
Search region = 49 px, Star mass tolerance = 50.0%
Camera = ZWO ASI290MC (ASCOM), full size = 1936 x 1096, no dark, no defect map, pixel size = 2.9 um
Exposure = 3000 ms
Mount = EQMOD HEQ5/6 (ASCOM), connected, guiding enabled, xAngle = -74.6, xRate = 1.954, yAngle = 8.3, yRate = 1.369, parity = +/+
Norm rates RA = 1.9"/s @ dec 0, Dec = 1.4"/s; ortho.err. = 7.1 deg
X guide algorithm = Hysteresis, Hysteresis = 0.100, Aggression = 1.000, Minimum move = 0.310
Y guide algorithm = Resist Switch, Minimum move = 0.310 Aggression = 100% FastSwitch = enabled
Backlash comp = enabled, pulse = 159 ms
Max RA duration = 2500, Max DEC duration = 2500, DEC guide mode = Auto
RA Guide Speed = 1.5 a-s/s, Dec Guide Speed = 1.5 a-s/s, Cal Dec = 0.2, Last Cal Issue = Rates, Timestamp = 3/11/2020 10:14:29 PM
RA = 23.87 hr, Dec = 0.2 deg, Hour angle = 0.34 hr, Pier side = East, Rotator pos = N/A, Alt = 55.8 deg, Az = 351.0 deg
Lock position = 965.546, 621.338, Star position = 965.546, 621.338, HFD = 4.51 px


The Sky-Watcher AZ-EQ6 GT is designed for the professional astrophotographer who wants a solid and reliable mount with a payload of up to 20kg. It combines the advantages of the equatorial mount with the simplicity of the alt-azimuth system. In fact, the AZ-EQ6 is a hybrid mount usable in both these configurations.

When the mount is configured in Alt-Azimuth mode, it can carry a second instrument by attaching the dual saddle (Vixen and Losmandy style) to the counterweight bar. When the mount is set in alt-azimuth mode, the optical tube has to be mounted on the right hand side when pointing forward. 

In equatorial mode the AZ-EQ6 shows all its potential in astrophotography. It has a build-in polar scope with southern hemisphere reference and the polar alignment is easy and precise due to the azimuth and elevation screws.
It is compatible with the Ascom drivers but also allows to guide with the ST4 protocol. The periodic error can be reduced through the PPEC (Permanent Periodic Error Correction). Differently to the HEQ5 and the NEQ6, the AZ-EQ6 uses one belt for the transmission between the stepper motor and the worm drive rather than two gears. This belt reduces the overall backlash, the noise and the long period periodic error. Both axes are equipped with the belt transmission system.

The SynScan computerised go-to system has a database with 42,900 objects to quickly locate and slew to target. It has 9 slewing speeds up to 800 times the sidereal speed (3.3°/sec).

The AZ-EQ6 is equipped with a SNAP port for controlling the camera shutter release. The dual dovetail bar can accept both Losmandy and Vixen style bars. 

Az-Eq6 drawing

Download the Az-Eq6 user manual

Download the Az-Eq6 motor board firmware


Mount type

German equatorial / Alt-azimuth

Payload capacity

20 kg

Latitude range

10° to 75°

Azimuth adjustment

± 9°

Dovetail saddle

Accepts Vixen and Losmandy bars


15.4 kg (head) + 7.5 kg (tripod)

Counterweight rod

Ø 25 mm, length 202 mm + 150 mm extension

Power requirement

DC 12~16 V  4 Amp


1.8 º Hybrid Stepper Motor

Tracking rate

Sidereal rate, solar rate, lunar rate

Auto guiding speed

0.125 x, 0.25 x, 0.5 x, 0.75 x, 1 x

Pointing accuracy

Up to 5 arc-minutes (RMS)





  • SkyWatcher AZ-EQ6 mount
  • Steel tripod
  • Counterweights (2 x 5 kg)
  • Counterweight extension bar
  • Second telescope saddle (Vixen and Losmandy style)
  • Polar scope (Southern and Northern Hemisphere)
  • USB adapter (SWA-USB)
  • Wi-Fi adapter (SW-WIFI)
  • Power supply cord (lighter plug)
  • Mount and SynScan user manual
  • The mount does not include the hand controller as it has been replaced by the Wi-Fi adapter.
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