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Explore Scientific EXOS-2 PMC-Eight GOTO Mount


Quick Overview

Explore Scientific EXOS-2 PMC-Eight GOTO Mount - a revolutionary belt-driven German equatorial mount with wireless goto control and the first commercially available wireless ST4 protocol autoguiding function. Whisper quiet, with high accuracy, low periodic error and a loading capacity of 13kgs, this mount is sure to win fans all over the world.

Check out the video review of the mount's features below:

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The Explore Scientific EXOS2-GT with PMC-8 Electronics is a big leap forward in goto mount design and functionality. Based on the Exos2 German Equatorial mount architecture, Explore Scientific have added new belt driven dual stepper motors, the unique military grade PMC-8 wireless goto hardware (featuring 2 channel 8-CPU microprocessor), all controlled with the Explore Scientific ExploreStars Open Goto App, which runs on Windows PC, tablets and Smartphones. This delivers a mount which is whisper quiet in operation, with high positional accuracy, low periodic error, wireless control AND wireless ST4 protocol autoguiding functionality too - plus class leading electronic hardware.

Most of the serious amateur goto mounts on the market today offer controllers with single processors. The PMC-8 electronics are extremely robust in comparison. They include a 2-Channel Multi-Processor Micro-controller with 8 CPUs that run independently and are completely deterministic in their behaviour – hence the name PMC-8.

Within this multi-processor system is a 64 Kbyte EEPROM Non-Volatile Memory bank used to store parameters; a Wireless Ethernet 10/100 with full IP function which permits operation from anywhere using a browser, ASCOM, or APP over the web or serial port; and Non-Volatile Memory used to store user selected parameters.

The electronics also includes an Auto-Guide port (ST4 contact input) and features the only wireless ASCOM driver on the market. The belt driven system uses 2 timing pulleys (1-45 groove and 1-10 groove) with fibreglass reinforced neoprene belt, connected to high quality Nema11 bi-polar stepper motor (0.67 amps 12ncm). Precise ball bearings in both axes ensures minimal backlash at all nine possible tracking speeds.

This mount can be run from 12v mains supplies and field batteries (supplied separately), using 2.5mm centre positive jack leads. The mount head rests on a very tough and rigid stainless steel tripod with adjustable 2" legs from 26.8" to 42.5" and can support up to 12.7kg/28 lbs. of equipment. 2x 4.5kg counterweights are supplied as standard.

Controlled by the class leading PMC-Eight wireless control system, this mount doesn't require a handset and will run off a modern Android device (minimum screen Size: 7-inches), Apple iPads (running iOS12+), or Windows 10 tablets and computers (please note: the app will not install on smaller phones or tablets). In addition to these packages, the PMC-8 is also fully ASCOM compliant and will connect to any ASCOM Standards Compliant POTH Client from Explore Scientific (either wired or wireless) to work with virtually any sky software that supports ASCOM. The Explore Stars control app can be downloaded from Android, Apple and Windows app stores and is a very intuitive piece of software, with the ability to use your device's GPS signal to download location and time/date data - no more entering info by hand. Explore Stars allows for simple setup with the click of a button.The ExploreStars OpenGoto® Software has the same basic functions as most goto mounts on the market today. ExploreStars is a free App downloadable from the Microsoft App store. The basic download includes a standard 2 star or 3 star alignment procedures, over 70,000 star database, the Messier Catalogue and Solar System objects. The software interface features a Classic four-button pattern for guiding, centring, moving and slewing on the touch screen of your tablet or phone. Pull-down menus open to offer the intuitive 2 star and 3 star alignment procedure, selection of the various catalogues, guided tours, the sync button, the park position, search feature and the coordinate input screen to enter RA and DEC coordinate information. Numerical key pad allows for selectable and user enterable GOTO speeds for slewing, centring and guiding rates. You can also set sidereal, king, lunar, solar, and user defined tracking rates.

What makes the ExploreStars OpenGoto® Software software different is that YOU can write your own code and import it into this software. Create a Messier challenge. Create a selectable list of objects you want to photograph and program that information into the software. With the ability to write your own code, you can create whatever your heart desires. Share it with the community of astronomers that are using this software.
In addition, this mount can be controlled by any ASCOM compliant software using the built-in wireless ASCOM driver. GPS-compatible and auto time / date settings are dependent on optional receiver on computer, tablet or phone.

Here are most of the ASCOM software packages available for use with the Explore Scientific EXOS2-GT / Losmandy G-11 with PMC-8 mounts: ACP; APT; AST / ATC & Ricerca (Omega Lab); AstroArt; AstroMB; Cartes du Ciel / Sky Chart; CCD AutoPilot; DeepSky; Deepsky Planner; DFM Engineering; Earth Centered Universe Pro; EasySky; Eye and Telescope; Project Pluto; Hallo Northern Sky; Maxim DL; MaxPoint; PinPoint Astrometric; Prism; Sequence Generator Pro; Sidereal Technology; The Sky; SkyMap Software; SkyTools 3; Star Atlas PRO; Sky Observer; StarryNight; Stellarium; Virtual Moon Atlas; and WorldWide Telescope.


To start using ExploreStars, download the free app and download the celestial data set that contains the astronomical catalogues, reference images, and reference text. This dataset can be found at

Simply unzip the ExploreStars folder containing the expanded celestial data set into your Pictures directory, you will expand the native database from a thousand objects to over seventy thousand objects.

More Information and Download-Service:


  • Unique PMC-8 Open Goto System

  • Beautiful full graphical user interface using Explore Scientific’s very own ExploreStars OpenGoto

  • Controlled from a Windows PC, Windows Tablet or Windows Smartphone, Apple iPad, or Andoid tablet (7" display minimum for all devices)

  • Classic four-button pattern for guiding, centring, moving and slewing on the touch screen

  • Intuitive 2 star and 3 star alignment procedure

  • Multiprocessor Micro Controller with 8 CPU´s

  • Micro-Stepper Motors NEMA-11

  • Highly accurate and silent Belt-Drive System

  • ASCOM Driver available: YES

  • YOU can write your own code and import it into this software

  • GPS-compatible and auto time / date settings are dependent on optional receiver on computer, tablet or phone

What’s In The Box:

  • Explore Scientific EXOS2-GT with Open GOTO PMC-8

  • Stainless steel tripod ST-3 with 2" legs and bubble level

  • Counter weight 2 x 4.5 kg 

  • Polefinder with illumination unit

  • ExploreStars Software via download


This package doesn´t include any WINDOWS Computer, Tablet or Smartphone.


Total length

100 mm

Total width

100 mm

Total height

160 mm

Maximum load capacity

13 kg

Net Weight total (incl. accessories)

19.5 kg

Net weight mount (incl. accessories)

5 kg

Net weight tripod (incl. accessories)

5.5 kg


9 kg



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