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fornax 102 Heavy Duty Equatorial Mount
fornax 102 Heavy Duty Equatorial Mount
fornax 102 Heavy Duty Equatorial Mount

fornax 102 Heavy Duty Equatorial Mount

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Fornax 102 Heavy Duty German Equatorial Telescope Mount plus MC5 Motor Controller plus Ursa Minor Pro Planetarium and Telescope Control Software

  • Max recommended visual load (without the weight of counterweights): appr. 100kg
  • Max recommended photographic load (without the weight of counterweights): appr. 80kg

Optionally available: Extremely high quality / high precision Heidenhain ECN 125 2048 5XS08-c4 R absolute encoders on both axis.

This is the latest incarnation of the former Fornax 100 mount. The New Fornax 102 comes with much strengthened and improved wormbox that makes it an even more precise mount. The new housing of the worm drive is stronger and it has got an extra unit that holds it in exact position, eliminating any sideway movement that could have occurred in earlier versions when changing direction under heavy load.

Designed and manufactured in the Europe Union, Fornax Telescope Mounts are a series of German Equatorial mounts for precise positioning and tracking large telescopes. These are available in various payload capacities: 50kg, 100kg, 150kg and 200kg (the latter one is coming soon). There is also a very compact, mobile version called Fornax 10 LighTrack that serves as a lightweight astro photo tracking solution.

The Fornax 102 telescope mount is a heavy duty German Equatorial mount for precise positioning and tracking extremely large telescopes up to about 80-90kg. Although there are examples of use of even heavier telescopes up to 100kg, the recommended maximum load is about 80kg for this telescope mount when used for imaging.

The mechanism of this extremely sturdy mount is being made of aluminium alloy, cast aluminium, bronze and stainless steel. The worm and the electric motor are located in an enclosed, sealed space (waterproof and dust-proof), making it less sensitive to dust and temperature fluctuations, and is practically maintenance free.

Thanks to the ingenious solution of the inner drive mechanism this telescope mount doesn't suffer from any backlash. A very large worm wheel is driven by a precisely engineered worm gear that is connected to the electric motor via a belt-drive system.

Typical periodic error (when not guided) is less than +/- 6 arc seconds (one period on the worm gear is 7.5 minutes long!)

When using a TDM (Telescope Drive Master), this can be reduced to below +/-0.5 arc seconds. (TDM is an alternative solution to guiding.)

When using auto guiding, the mount reacts immediately, so corrections are very fast and completely free of play. This is the ultimate solution for astrophotography with a high quality/price ratio!

Due to its weight and size this model is designed for observatories, not exactly a transportable model!

Delivery Information:
Please contact us to discuss the possible delivery options. The delivery fee and time will depend on your location (e.g. U.K. or overseas) as well as your requirements.


Specifications: fornax 102 Heavy Duty Equatorial Mount

  • Weight: 50kg
  • Recommended maximum telescope weight: appr. 80-90kg
  • Overall dimensions: 300 x 400 x 400mm
  • Shaft diameter: 80mm, anodised aluminium alloy
  • Bearings: diameter 125mm, high precision tapered roller bearings in X layout
  • Gear: diameter 242.5mm, 1.25 modul, bronze, 192 teeth
  • Worm: diameter 27.5mm, multiple thread, grinded, hardened, corrosion proof steel (KO13)
  • Tracking precision: < +/- 1 arc seconds without autoguiding
  • Stepper Motors: 200-phase step / rev., 1.3Nm
  • Voltage and Current: 12V DC, 3.5A peak power consumption at max. load
  • Counterbalance holder tube: diameter 42.4mm (1.25" KO33 tube) x length 570mm
  • Step-resolution: 0.5 arc seconds / step
  • Maximum speed: 4 degrees / second
  • Optional encoders: Heidenhain ECN 125 2048 5XS08-c4 R absolute encoders on both axis.


What's in the Box

What's in the Box: fornax 102 Heavy Duty Equatorial Mount

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