ioptron cem40

iOptron CEM40 Review

Astrophotography is a popular hobby that requires precise equipment to capture the beauty of the night sky. The iOptron CEM40 mount is a top-of-the-line option for those looking to take their astrophotography to the next level. In this review, we will dive into the features and capabilities of the iOptron CEM40, to help you determine if it is the right mount for your needs.

Design and Build Quality

The iOptron CEM40 mount features a unique center-balanced design that provides excellent stability and makes it easier to balance heavier telescopes. This design also reduces the chance of the mount tipping over, making it more stable during use. The mount is made with high-quality materials, and its sturdy build ensures long-lasting durability.

The mount is designed for use with both equatorial and alt-azimuth modes, making it a versatile option for a range of astrophotography needs. The CEM40 features a built-in WiFi module, allowing for wireless control through a mobile device or computer.

Tracking and Guiding

The iOptron CEM40 features advanced tracking capabilities, including a high-precision encoder and advanced low-cog servo motors. This allows for smooth and accurate tracking, minimizing the need for constant adjustments during use.

Additionally, the CEM40 comes with a built-in guiding port and ST-4 compatible auto-guiding port. This makes it easy to connect a guide camera and perform accurate autoguiding, further enhancing the accuracy and precision of your astrophotography.

Polar Alignment

Polar alignment is a critical component of astrophotography, and the iOptron CEM40 makes this process easier with its advanced iPolar alignment system. This system uses a built-in camera to analyze the starfield and provide accurate polar alignment in minutes. This saves time and eliminates the need for external polar alignment tools, making it easier to set up and get started with astrophotography.


The iOptron CEM40 can support up to 40 pounds of weight, making it a suitable option for a range of telescopes and astrophotography equipment. Its center-balanced design also makes it easier to balance heavier equipment and reduces the likelihood of tipping over.

Ease of Use

The iOptron CEM40 is easy to set up and use, with intuitive controls and a user-friendly interface. The built-in WiFi module allows for wireless control through a mobile device or computer, adding convenience and flexibility to the astrophotography experience.


The iOptron CEM40 is a high-end mount, with advanced features and capabilities. As such, it comes with a higher price tag compared to other mounts on the market. However, the investment may be worth it for those who are serious about astrophotography and want a reliable and versatile mount for their equipment.


Overall, the iOptron CEM40 mount is an excellent option for astrophotographers who want advanced features and capabilities for their equipment. Its center-balanced design, advanced tracking and guiding capabilities, iPolar alignment system, and wireless control make it a versatile and user-friendly option for capturing stunning images of the night sky.

While the higher price tag may be a consideration for some, the CEM40's advanced features and durability make it a worthwhile investment for serious astrophotographers. If you are in the market for a high-quality mount for your astrophotography needs, the iOptron CEM40 is definitely worth considering.

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