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Slow motion control

The slow-motion control function is used to make small, precise movements of a telescope to keep the observed object in the field of view of our eyepiece. With controllers, the user can easily follow the star as it moves across the sky. Slow-motion control is often used on non-motorized telescope mounts in the form of rods or knobs

Slow motion control
The example of a slow-motion controller on an equatorial mount

Depending on the type of mount, there can be a different number of slow-motion controllers installed on it. The mount can have a motion control knob on the x-axis, y-axis, or on both axes.

The slow-motion control function can be found on both types of mounts:

  • equatorial and
  • altazimuth.

Mostly they are installed on manual mounts, but they can also be found on computerized mounts. Some mounts have a built-in computer but no motor drive to move the telescope in the desired direction. No motor drive means that the user needs to move the telescope by hand or use slow motion controllers while the computer guides the way.

Some better and more expensive GoTo mounts also have slow motion controllers. With them, the user can still manually move the telescope in case the power runs out.



  • What a fascinating read on the topic of slow-motion control! This blog post highlights the art and science behind capturing those mesmerizing slow-motion sequences. I couldn’t agree more that slow motion can transform ordinary moments into extraordinary ones, revealing a new perspective that often goes unnoticed in real-time.

    The way this article breaks down the critical elements of slow-motion control is both informative and engaging. Starting with understanding frame rates and shutter speeds, it provides a solid foundation for anyone venturing into slow-motion cinematography. The analogy of the flipbook perfectly illustrates the concept, making it easily comprehensible even for those who may not be well-versed in technical terms.

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