Equatorial Telescope Mounts Explained

An equatorial telescope mount, commonly known as an EQ mount, is designed to follow the apparent movement of objects across the night sky. They are popular with experienced observers and are especially important for astrophotography.

How Does an Equatorial Mount Work?

Unlike a standard alt-azimuth mount, an equatorial mount is aligned with the Earth's rotational axis through a process called polar alignment.

Once correctly aligned, the telescope can follow stars and other celestial objects primarily by moving around a single axis known as the right ascension (RA) axis.

This makes accurate tracking much easier.

What Are Equatorial Mounts Best For?

Equatorial mounts are particularly suited to:

• Astrophotography

• Long observing sessions

• Tracking planets and deep-sky objects

• High-magnification observing

• Motorised and computerised telescope systems

They are available in a wide range of sizes, from lightweight manual mounts to sophisticated computer-controlled mounts designed for astrophotography.

What Is a German Equatorial Mount?

The German Equatorial Mount (GEM) is one of the most common EQ designs. The telescope sits on one side of the mount while counterweights on the opposite side balance the equipment.

This design is widely used for both visual astronomy and astrophotography.

Are Equatorial Mounts Difficult to Use?

There is a slightly steeper learning curve compared with an alt-azimuth mount. You'll need to learn basic balancing and polar alignment, but these processes quickly become familiar with practice.

Modern polar alignment tools and computerised mounts can also make setup considerably easier.

Is an Equatorial Mount Right for Me?

If you're interested in astrophotography, accurate tracking or developing a more advanced telescope setup, an equatorial mount is well worth considering.

For visual observing alone, a simpler alt-azimuth or Dobsonian mount may be more convenient.