If you’ve done with the two star alignment, press the BACK button to finish the alignment. Press ENTER key to select third star for further alignment.

5.4.5. Pole Star Position

This shows Polaris position in northern hemisphere or Sigma Octantis position in southern hemisphere, which is used for Quick Polar Alignment.

5.5. PEC Option

5.5.1. PEC Playback

You can turn “PEC Playback On” while you do the tracking, especially for long time astro- photography. The default status is PEC Playback Off when the mount is turned on.

5.5.2. Record PEC

All Equatorial mounts have a small variation in the worm gears which can be corrected by using Period Error Correction or PEC. PEC is a system which improves the tracking accuracy of the mount by compensating for variations in the worm gear and is especially useful when doing astrophotography without autoguiding. Because the variations are regular, it is possible to record the corrections required to cancel out the worm gear variations and to play them back.

In order to use the PEC function, the Go2Nova hand controller needs to record the PE first. The periodic error of the worm gear drive will be used to correct periodic error. The data will be lost when the power is turned off.

Here’s how to use the PEC function.

1.Setup the mount with a telescope in autoguiding condition by connecting a guiding camera to a computer via mount’s Guide Port or ASCOM protocol;

2.Press MENU, select “Auto Guide” and press ENTER. Select a guiding speed from 0.20X to

1.00X;

3.Then press the BACK button and select “PEC Option” from the menu. Use the ▲ and ▼ scroll buttons to display the “Record PEC” option and press ENTER to start record the PE.

4.It takes the worm gear 600 seconds to make one complete revolution. After 600 seconds PEC will automatically stop recording.

5.The data will be lost when the power is turned off.

5.6.Set User Objects

Besides various star lists available in the hand controller --you can add, edit or delete your own user- defined objects. You can also add your favorite observation object into the user object list for easy sky surfing. Up to 60 user objects can be stored here.

To set user objects, press MENU button, from the main menu, scroll down and select “Set User Objects”.

Set Up Controller

Align

PEC Option

Set User Objects

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iOptron ZEQ25GT instruction manual PEC Option, Set User Objects, Pole Star Position, PEC Playback, Record PEC
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ZEQ25GT specifications

The iOptron ZEQ25GT is a highly regarded telescope mount that integrates advanced technologies and user-friendly features, making it a top choice for both amateur astronomers and seasoned stargazers. Its design focuses on portability, versatility, and precision, which are essential for anyone looking to explore the night sky.

One of the standout characteristics of the ZEQ25GT is its exceptionally lightweight and compact design. Weighing just 27 pounds, it is one of the lightest mounts in its class, allowing for easy transport and setup at various observing locations. Despite its lightweight form, the mount supports a significant payload capacity of up to 28 pounds, allowing users to attach a variety of telescopes and imaging equipment.

The mount's innovative design incorporates a unique "Hybrid" mount architecture, which combines features of both German and fork mounts. This enables a more streamlined setup and better balance during observation sessions. Additionally, the ZEQ25GT employs a patented design where the counterweight shaft is positioned above the mount. This design eliminates the need for a long counterweight bar, further enhancing portability and reducing setup time.

In terms of technology, the ZEQ25GT features iOptron’s renowned GoTo system, which provides users with access to a database of over 200,000 celestial objects. The system is equipped with dual-axis tracking and ultra-quiet servo motors, ensuring smooth and precise movement when tracking celestial objects. The built-in GPS allows for quick and accurate location setup, making it easy for users to begin their astronomical adventures with minimal delay.

Moreover, the ZEQ25GT includes an innovative SmartStar technology, enabling automatic alignment and calibration. This feature is particularly beneficial for newcomers, as it simplifies the setup process and reduces the learning curve associated with equatorial mounts. Users can control the mount via a hand controller or through a computer interface using iOptron's iControl app for smart devices, offering additional flexibility and convenience.

Durability is another important aspect of the ZEQ25GT, constructed from high-quality materials that ensure longevity and reliability. Its solid aluminum body not only contributes to its lightweight nature but also assures stability during use, which is crucial for astrophotography and high-magnification observations.

In conclusion, the iOptron ZEQ25GT is a cutting-edge telescope mount that combines portability, advanced technology, and user-friendly features, making it an excellent choice for astronomers at all levels. Its innovative design, robust performance, and ease of use truly set it apart in the competitive landscape of astronomical equipment.
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