As astrophotographers and astronomers seek precise, smooth tracking with minimal gear backlash, equatorial mounts with belt drive systems have become increasingly popular. These mounts reduce gear noise and improve tracking accuracy, making them ideal for long-exposure astrophotography. In this roundup, I’ll highlight three standout options: the Celestron CGX, known for its high payload and advanced features; the MirroSky GX35, celebrated for its lightweight design and smart technology; and the iEXOS-100-2 PMC-Eight, which offers cutting-edge responsiveness for dedicated astrophotographers. Each has unique strengths and tradeoffs, so your choice depends on your specific needs—whether that’s high capacity, portability, or advanced control.
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Key Takeaways
- The Celestron CGX offers robust payload capacity and advanced computerized features but is quite heavy and complex to set up.
- MirroSky GX35 stands out for its lightweight, portable design and smart app integration, ideal for on-the-go users, but may require smartphone setup expertise.
- iEXOS-100-2 provides top-tier responsiveness with an eight-CPU processor and user-friendly app controls, suited for serious astrophotographers willing to handle a steeper learning curve.
- All three mounts incorporate belt drive systems that enhance tracking smoothness and reduce gear noise, but each varies significantly in size, complexity, and price.
- Choosing the right mount hinges on balancing your priority for portability, payload, control sophistication, and budget.
| Celestron CGX Computerized German Equatorial Mount & Tripod, 55 lb Payload |  | Best Overall for Heavy-Duty Astrophotography | Mount Type: German Equatorial | Payload Capacity: 55 lb | Weight: 108 pounds | VIEW ON AMAZON | See Our Full Breakdown |
| MirroSky by Spectrum Optical GX35 Smart EQ Mount with Guide Scope |  | Best for Portability and Smart Control | Optical Guidescope: 53mm ED | Weight: 8.8 lbs (4 kg) | Drive System: Worm gear and synchronous belt drives | VIEW ON AMAZON | See Our Full Breakdown |
| iEXOS-100-2 PMC-Eight Equatorial Tracker System Tripod and Mount for Astrophotography with WiFi and Bluetooth |  | Best for Advanced Users & Astrophotographers | Processor: Eight CPUs (PMC-Eight system) | Connectivity: WiFi and Bluetooth | Mount Type: Equatorial tracker | VIEW ON AMAZON | See Our Full Breakdown |
| equatorial mounts with belt drive system | Mount Type | Weight |
|---|---|---|
| Celestron CGX Computerized Ger | German Equatorial | 108 pounds |
| MirroSky by Spectrum Optical G | — | 8.8 lbs (4 kg) |
| iEXOS-100-2 PMC-Eight Equatori | Equatorial tracker | — |
More Details on Our Top Picks
Celestron CGX Computerized German Equatorial Mount & Tripod, 55 lb Payload
The Celestron CGX stands out for its impressive 55-pound payload capacity, making it suitable for large telescopes and serious astrophotography. Its belt drive system provides smoother tracking and quieter operation compared to traditional gear trains, which is a significant advantage during long exposures. The mount’s advanced computerized control, including a 40,000-object database and NexStar+ software, offers precise tracking and automatic slewing, simplifying complex setups. However, its weight (108 lbs) and complexity could be drawbacks for those needing portability or quick setup. This mount is ideal for dedicated astrophotographers who prioritize capacity and control over transportability.
Pros:- High payload capacity suitable for large telescopes
- Advanced computerized control with extensive object database
- Quiet, smooth belt drive operation
- Durable stainless steel tripod
Cons:- Heavy weight (108 lbs) makes transport difficult
- Setup can be complex and time-consuming
- Price is on the higher end
Best for: Heavy-duty astrophotography and advanced control needs
Not ideal for: Portable setups or beginners with limited technical experience
- Mount Type:German Equatorial
- Payload Capacity:55 lb
- Weight:108 pounds
- Dovetail Clamping:All-new dovetail clamping knobs
- Tracking:+20° of additional tracking past the meridian
- Control Software:NexStar+ with guided tours
Our verdict“A powerful, feature-rich mount perfect for serious astrophotographers demanding high capacity and precision.”
MirroSky by Spectrum Optical GX35 Smart EQ Mount with Guide Scope
The MirroSky GX35 offers an excellent balance of lightweight design and smart technology, making it ideal for astronomers who need portability without sacrificing capabilities. Its belt drive system ensures smooth, quiet tracking, and the included 53mm ED guidescope enhances accuracy for astrophotography. The mount’s standout feature is its integration with the MirroSky app, allowing control via smartphones or tablets on iOS and Android. While the app simplifies operation, beginners might find setup and app navigation a bit complex initially. This mount is best suited for users who want mobility and modern control options in a compact package.
Pros:- Lightweight at only 8.8 lbs for easy transport
- Smart app control for intuitive operation
- Includes essential accessories for immediate use
- Smooth belt drive for quiet tracking
Cons:- Full functionality depends on smartphone app
- Setup might be challenging for beginners
- Limited payload compared to larger mounts
Best for: Portable astrophotography and tech-savvy users
Not ideal for: Users preferring traditional manual control or those with limited smartphone experience
- Optical Guidescope:53mm ED
- Weight:8.8 lbs (4 kg)
- Drive System:Worm gear and synchronous belt drives
- Compatibility:MirroSky app for iOS and Android
Our verdict“A versatile, portable mount with smart tech features, perfect for mobile astrophotographers and tech enthusiasts.”
iEXOS-100-2 PMC-Eight Equatorial Tracker System Tripod and Mount for Astrophotography with WiFi and Bluetooth
The iEXOS-100-2 PMC-Eight targets serious astrophotographers with its eight-CPU processor, delivering rapid responsiveness and reliable tracking. Its belt drive system ensures smooth, jitter-free motion, especially important during long exposures. The mount’s control is managed via the ExploreStars app, compatible with Apple, Android, and Windows, providing easy alignment, star navigation, and precise polar and altitude adjustments. Its advanced features come with a learning curve, but the payoff is a highly responsive, customizable system. This mount makes the most sense for users comfortable with technology and seeking professional-grade performance.
Pros:- Eight-CPU system for fast, reliable operation
- Intuitive ExploreStars app for easy alignment
- Precise dual-axis worm gears for smooth movement
- Connectivity via WiFi and Bluetooth
Cons:- Setup complexity may require prior experience
- High cost compared to simpler mounts
- Requires compatible devices for app use
Best for: Experienced astrophotographers seeking high responsiveness
Not ideal for: Beginners or those on a tight budget
- Processor:Eight CPUs (PMC-Eight system)
- Connectivity:WiFi and Bluetooth
- Mount Type:Equatorial tracker
- Gears:Clutched dual-axis worm gears
- Control:ExploreStars app
Our verdict“A high-end mount designed for professionals and enthusiasts demanding ultra-responsive tracking and sophisticated control.”
How We Picked
Our selection process focused on mounts with integrated belt drive systems, emphasizing smoothness, noise reduction, and accuracy. I prioritized models that balance performance with user-friendliness, considering factors such as payload capacity, control options, portability, and overall build quality. Each product was chosen for its distinctive role—whether for heavy-duty astrophotography, lightweight portability, or advanced computer control—ensuring a diverse lineup that covers different user needs.
| equatorial mounts with belt drive system | Mount Type |
|---|---|
| Celestron CGX Computerized Ger | German Equatorial |
| MirroSky by Spectrum Optical G | — |
| iEXOS-100-2 PMC-Eight Equatori | Equatorial tracker |
Factors to Consider When Choosing Equatorial Mounts With Belt Drive Systems
When choosing an equatorial mount with a belt drive system, several factors influence your decision. First, consider your primary use—whether astrophotography, visual observing, or portability. Next, evaluate the payload capacity to match your telescope size and weight. The mount’s control system and connectivity options also matter, especially if you prefer automation or remote use. Belt drives are valuable for their quieter, smoother operation but vary in sophistication and price. Understanding these key differences can help you select a mount that balances performance, ease of use, and budget.
Payload Capacity and Size
Determine how heavy your telescope and accessories are, then choose a mount that comfortably supports that weight. Larger mounts like the Celestron CGX can handle bigger telescopes but tend to be heavier and less portable, making setup more challenging. Conversely, lightweight options like the MirroSky GX35 excel in portability but may have limited capacity—suitable for smaller telescopes or lighter setups. Matching size and weight helps ensure stability and ease of use without overburdening your mount’s motors or structure.
Control and Connectivity
Advanced control options, such as computerized hand controllers or smartphone apps, can streamline your observing sessions. Mounts like the iEXOS-100-2 with WiFi and Bluetooth provide versatile connectivity and easy star alignment, ideal for users comfortable with tech. Simpler mounts may rely on manual operation or basic motors, which are more affordable but require more effort during setup. Consider whether you want remote capabilities, guided star navigation, or manual control, and choose accordingly.
Smoothness and Noise Reduction
Belt drive systems are prized for their quiet, smooth tracking, which minimizes vibrations that can blur images during long exposures. All three mounts here feature belt drives, but the quality varies. The precision dual-axis worm gears and high-quality belts in the iEXOS-100-2 make it especially suitable for astrophotography demanding motion accuracy. The Celestron CGX’s belt drive also offers exceptional smoothness, while the MirroSky’s belt drive provides quiet operation suitable for both visual and astrophotography use.
Budget and Complexity
High-performance mounts tend to come with a higher price tag and more complex setup procedures. The Celestron CGX, while offering extensive features, may be overwhelming for beginners or casual users. The MirroSky GX35 strikes a balance, offering portability and smart features at a more accessible price point. The iEXOS-100-2 is a premium choice, best for experienced users who need advanced responsiveness and are willing to handle a steeper learning curve. Weigh your budget against your technical comfort level to find the best match.
Frequently Asked Questions
What is a belt drive system on an equatorial mount?
A belt drive system on an equatorial mount uses belts instead of traditional gear wheels to transfer motor motion to the axes. This design reduces gear backlash and noise, resulting in smoother, quieter tracking—especially important during long-exposure astrophotography. Belt drives also tend to have less mechanical wear over time, maintaining accuracy for prolonged use.
Are belt drive mounts suitable for beginner astronomers?
Yes, belt drive mounts can be suitable for beginners, especially models that balance ease of use with good tracking performance. However, some advanced belt drive mounts with integrated smart controls or high payload capacities may require a learning curve and technical familiarity. For absolute beginners, starting with a more straightforward setup and gradually moving to more sophisticated mounts is often advisable.
How does belt drive improve astrophotography performance?
Belt drives significantly reduce gear backlash and vibrations, leading to more precise and stable tracking during long exposures. This results in sharper images with fewer star trails or blurring caused by mechanical imperfections. The quieter operation also minimizes vibrations that can ruin sensitive astrophotography sessions, making belt drive mounts a preferred choice among dedicated astrophotographers.
Can I upgrade an existing mount with a belt drive system?
In most cases, upgrading an existing mount to include a belt drive system requires replacing or modifying the gear train, which can be complex and may void warranties. Many manufacturers offer belt drive upgrade kits designed for specific models, but compatibility varies. It’s generally more straightforward to purchase a new mount that already incorporates belt drives if this feature is important to you.
What should I consider when choosing between these mounts?
Key considerations include your primary use—whether astrophotography, visual observing, or portability. Payload capacity is critical if you plan to use larger telescopes. Connectivity options like app control or manual operation influence ease of use and automation. Additionally, weigh the total cost and complexity of setup against your experience level and budget. Each of these mounts offers a different balance of these factors, so aligning your priorities is essential.
Conclusion
For those prioritizing heavy-duty astrophotography and advanced features, the Celestron CGX offers unmatched payload capacity and control sophistication, making it ideal for serious amateurs and professionals. If portability and modern smart control are your main concerns, the MirroSky GX35 provides excellent performance in a lightweight form factor, perfect for mobile setups or beginners eager to explore astrophotography with minimal fuss. For experienced users seeking top-tier responsiveness and customization, the iEXOS-100-2 PMC-Eight delivers professional-grade tracking and control, though it requires a steeper learning curve. Your choice should reflect your specific needs, whether that’s maximum payload, portability, or advanced automation.
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