Astronomy Specialist



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Testar Australia inspects and tests demo instruments and guarantees its quality. This SkyWatcher AZ-EQ6 is in excellent cosmetic condition and works perfectly. The bearings of the RA worm gear have been replaced with hybrid ceramic bearings and the worm drive has been fully regreased with special aeronautical grease. 

  • 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 demo mount has been tested in real conditions under the sky, you can download the PHD 2 here. 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 38 minutes
Telescope used
SkyWatcher Evostar ED80 (F.600mm)
Periodic error 17"
Total RMS tracking accuracy
Right Ascension RMS tracking accuracy 
Declination RMS tracking accuracy  0.52"
PHD2 Tracking info Guiding Begins at 2021-06-27 01:09:07
Equipment Profile = ZWO 290 + 80ED 600mm
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 = 50 px, Star mass tolerance = 50.0%, Single-star mode
Camera = ZWO ASI290MM, gain = 30, full size = 1936 x 1096, no dark, no defect map, pixel size = 2.9 um
Exposure = 2500 ms
Mount = EQMOD HEQ5/6 (ASCOM), connected, guiding enabled, xAngle = -26.9, xRate = 8.504, yAngle = 63.2, yRate = 7.152, parity = +/+
Norm rates RA = 8.5"/s @ dec 0, Dec = 7.1"/s; ortho.err. = 0.1 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 = 100 ms
Max RA duration = 2500, Max DEC duration = 2981, DEC guide mode = Auto
RA Guide Speed = 7.5 a-s/s, Dec Guide Speed = 7.5 a-s/s, Cal Dec = -0.0, Last Cal Issue = None, Timestamp = 27/06/2021 1:09:07 AM
RA = 19.53 hr, Dec = -0.0 deg, Hour angle = 0.04 hr, Pier side = East, Rotator pos = N/A, Alt = 56.2 deg, Az = 359.0 deg
Lock position = 1350.115, 79.751, Star position = 1350.115, 79.751, HFD = 4.16 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. The equatorial mode is ideal for astrophotography while the alt-azimuth configuration is more practical for observation as polar alignment is not required. 

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. The detachable saddle has two adjustment screws that allow to rotate the saddle and align the secondary telescope with the main one. 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. Working with the SynScan hand control’s “Camera Control” function, you can take batch exposures in up to 8 groups of “Exposure-time & Frames”.

The dual dovetail bar can accept both Losmandy and Vixen style bars and the two tightening knobs do not touch the dovetail bar directly, avoiding marks on your telescope. 

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)
  • SynScan hand controller with cable (RJ45 to RJ45)
  • SkyWatcher USB adapter to connect the mount to a computer.
  • Power supply cord (lighter plug)
  • Mount and SynScan user manual
  • Free Az-Eq6 Pack in bag
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