Choosing an equatorial mount with belt drive means balancing portability, payload, and how you want to control your setup. I put the MirroSky GX35 first for its light body and integrated guide camera, the Celestron CGX ahead for heavy telescope loads, and the iEXOS-100-2 in the mix for tablet-based control and quiet belt-driven tracking. Their differences matter: the GX35 packages guiding into a compact system, the CGX is built around a much larger stated payload, and the iEXOS-100-2 favors a connected, app-led workflow. I rank them by how clearly each system pairs its belt drive with a distinct buyer need, while weighing practical limits such as power, payload, and reliance on a smart device.
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Key Takeaways
- The MirroSky GX35 is the most portable listed mount at 8.8 pounds and includes a 53mm ED guidescope with a Sony IMX662 camera.
- The Celestron CGX has the largest stated payload at 55 pounds, making it the strongest fit here for a substantially heavier telescope setup.
- The iEXOS-100-2 combines stepper motor belt drives with PMC-Eight control and WiFi and Bluetooth, but full app control calls for a tablet.
- Belt drives appear on all three, but the mounts differ in their control systems: MirroSky app, NexStar+ hand controller, and ExploreStars app.
- Payload figures need context: the GX35 listing says its 22-pound capacity includes the counterweight, while the other product descriptions do not detail comparable load conventions.
| MirroSky by Spectrum Optical GX35 Smart EQ Mount with Guide-Scope |  | Best Overall for Portable Guided Imaging | Mount type: Equatorial and Alt-Azimuth | Mount weight: 8.8 lb (4 kg) | Payload capacity: 22 lb (10 kg), including counterweight | VIEW ON AMAZON | See Our Full Breakdown |
| Celestron CGX Computerized German Equatorial Mount & Tripod |  | Best for Heavy Telescope Loads | Mount type: German equatorial | Payload capacity: 55 lb | Drive system: Belt drive with high-torque servo motors | VIEW ON AMAZON | See Our Full Breakdown |
| iEXOS-100-2 PMC-Eight Equatorial Tracker System with Tripod and Mount |  | Best for Tablet-Based Control | Mount type: Equatorial tracker | Control system: Explore Scientific PMC-Eight with eight independent CPUs | Drive system: Clutched dual-axis worm gears with stepper motor belt drives | VIEW ON AMAZON | See Our Full Breakdown |
| equatorial mounts with belt drive system | Mount type | Payload capacity | Drive system |
|---|---|---|---|
| MirroSky by Spectrum Optical G | Equatorial and Alt-Azimuth | 22 lb (10 kg), including counterweight | 144-tooth worm gear and synchronous belt |
| Celestron CGX Computerized Ger | German equatorial | 55 lb | Belt drive with high-torque servo motors |
| iEXOS-100-2 PMC-Eight Equatori | Equatorial tracker | Not stated in the supplied description | Clutched dual-axis worm gears with stepper motor belt drives |
More Details on Our Top Picks
MirroSky by Spectrum Optical GX35 Smart EQ Mount with Guide-Scope
The MirroSky GX35 is the most self-contained imaging-oriented choice in this group. Its 8.8-pound mount pairs a stated 22-pound payload with a 53mm ED guidescope and Sony IMX662 camera, so guiding hardware is part of the package rather than a separate item to select. That combination makes it easier to build a relatively light portable system than with the CGX, whose 55-pound capacity points toward larger equipment and whose listed package does not specify an integrated guide camera.
The drive setup combines a 144-tooth worm gear and synchronous belt, and the mount supports EQ and Alt-Az modes. The MirroSky app provides control on iOS and Android, which keeps the kit centered on a phone or tablet workflow instead of the CGX’s NexStar+ hand controller. Its key limitation is the load figure: the description says capacity includes the counterweight, so buyers should check whether their telescope and accessories fit within the usable allowance. An external 12V 3A supply is also required. I place it first because the light body and included guide system form the clearest portable belt-drive package here, not because it has the highest capacity.
Pros:- 8.8-pound mount body is the lightest stated option in this comparison.
- Includes a 53mm ED guidescope and Sony IMX662 guide camera.
- Combines a synchronous belt drive with a 144-tooth worm gear.
- Offers EQ and Alt-Az modes with iOS and Android app support.
Cons:- The stated 22-pound capacity includes the counterweight, which may constrain telescope and accessory choices.
- Requires an external 12V 3A power source.
Best for: Astrophotographers seeking a portable EQ mount with an included guidescope and guide camera.
Not ideal for: Owners of heavy telescope rigs or buyers who need a mount that does not depend on external 12V power and app control.
- Mount type:Equatorial and Alt-Azimuth
- Mount weight:8.8 lb (4 kg)
- Payload capacity:22 lb (10 kg), including counterweight
- Drive system:144-tooth worm gear and synchronous belt
- Guidescope:53mm ED
- Guide camera:Sony IMX662 CMOS, 2.1 MP
- Power input:12V 3A
- Control:MirroSky app for iOS and Android
Our verdict“I recommend the GX35 for portable guided imaging when its counterweight-inclusive payload limit fits the complete rig.”
Celestron CGX Computerized German Equatorial Mount & Tripod
If telescope capacity sets your choice, the Celestron CGX takes the lead: its stated 55-pound payload is well above the GX35’s 22 pounds and makes this the clear pick in this lineup for a heavier rig. The drive combines high-torque servo motors with belt-drive technology, giving buyers a belt-driven system designed around a larger German equatorial setup. The product information does not provide a matching weight or tripod material, however, so the published load figure alone cannot tell you how easy the complete mount and tripod will be to transport.
Control is another point of difference. The included NexStar+ hand controller has a 40,000-object database, guided tours, and custom object filters; that is a more direct hand-controller approach than the phone app on the GX35 or the tablet-centered ExploreStars setup on the iEXOS-100-2. The CGX therefore suits buyers who want broad computerized object selection along with higher stated capacity. Its listing gives fewer specifics about guiding hardware and portability than the GX35, and it does not describe the same tablet connectivity options as the iEXOS-100-2. I rank it second overall because it is the strongest high-capacity option but is less clearly suited to a portable, integrated imaging package.
Pros:- Highest stated capacity in this comparison at 55 pounds.
- Uses high-torque servo motors with belt-drive technology.
- Includes a NexStar+ computerized hand controller.
- Controller database includes 40,000 objects, guided tours, and custom filters.
Cons:- The supplied details do not state tripod material or total mount and tripod weight.
- The product description does not list an included guidescope or guide camera.
Best for: Observers with heavier telescope assemblies who want a computerized German equatorial mount and dedicated hand controller.
Not ideal for: Travel-focused buyers who need a clearly documented lightweight system or an included guidescope and guide camera.
- Mount type:German equatorial
- Payload capacity:55 lb
- Drive system:Belt drive with high-torque servo motors
- Controller:NexStar+ computer hand controller
- Object database:40,000 objects
- Controller features:Guided tours and custom object filters
- Tripod details:Material and weight not specified in the supplied description
Our verdict“I would choose the CGX when its 55-pound stated capacity and hand-controller database matter more than compactness or bundled guiding.”
iEXOS-100-2 PMC-Eight Equatorial Tracker System with Tripod and Mount
The iEXOS-100-2 is the app-led choice in this group. Its PMC-Eight system uses eight independent CPUs, with WiFi and Bluetooth control through ExploreStars on Apple, Android, or Windows tablets. For buyers who prefer a connected tablet workflow, that gives it a different role from the CGX, which includes a dedicated hand controller, and the GX35, whose app accompanies an integrated guiding package.
Its mechanical description pairs clutched dual-axis worm gears with quiet precision stepper motor belt drives. The clutched axes support balancing and repositioning, while a polar alignment sight hole through the RA axis offers a basic alignment aid. Those are useful details for a tracker system, but the supplied information does not give a payload rating to compare directly with the 22-pound GX35 or 55-pound CGX. It also specifies no focuser, and full use of the app depends on a tablet. I rank it third because its connectivity and drive design are appealing, but its stated fit is harder to judge without a payload figure and it asks the buyer to bring a compatible device.
Pros:- PMC-Eight design uses eight independent CPUs.
- Quiet stepper motors drive the dual-axis worm gear system through belts.
- Offers WiFi and Bluetooth connectivity with ExploreStars on multiple tablet platforms.
- Clutched axes support balancing and repositioning.
Cons:- A tablet is required for full app functionality.
- No focuser is included.
- The supplied description does not state a payload capacity.
Best for: Tablet users looking for an equatorial tracker with wireless app control, quiet belt drives, and clutched axes.
Not ideal for: Buyers who want a published payload capacity, a dedicated hand controller, or a focuser included in the system.
- Mount type:Equatorial tracker
- Control system:Explore Scientific PMC-Eight with eight independent CPUs
- Drive system:Clutched dual-axis worm gears with stepper motor belt drives
- Connectivity:WiFi and Bluetooth
- Compatible devices:Apple, Android, and Windows tablets
- Polar alignment aid:Sight hole through the RA axis
- Focuser:Not included
- Payload capacity:Not stated in the supplied description
Our verdict“I favor the iEXOS-100-2 for tablet-controlled operation, provided the buyer can confirm that its capacity suits the intended telescope.”
How We Picked
I ranked these mounts by how well their stated belt-drive systems fit a clear observing or imaging need, then compared payload, portability, tracking hardware, and control options. A belt drive is only one part of a mount: I also looked at the accompanying worm gears or servo motors and whether the system is presented as a compact imaging package, a high-capacity German equatorial mount, or an app-controlled tracker. That makes the ranking useful to buyers who have a particular telescope and workflow in mind.
The GX35 leads for portability and integrated guiding, although its payload note deserves attention and it needs an external power source. The CGX ranks first for stated load capacity and offers a dedicated hand controller, but the supplied details leave tripod weight and material unspecified. The iEXOS-100-2 brings a distinct connected control approach and quiet stepper belt drives, though users need a tablet for full app functionality. I have treated the supplied product details as the basis for the comparison; they do not provide a common tracking-accuracy figure or directly comparable tripod specifications.
| equatorial mounts with belt drive system | Mount type |
|---|---|
| MirroSky by Spectrum Optical G | Equatorial and Alt-Azimuth |
| Celestron CGX Computerized Ger | German equatorial |
| iEXOS-100-2 PMC-Eight Equatori | Equatorial tracker |
Factors to Consider When Choosing Equatorial Mounts With Belt Drive Systems
I would begin with the telescope and the way you plan to control the mount, then use the belt-drive description as a point of comparison. These three products all pair belts with other drive or tracking hardware, but their intended roles differ sharply.
Match payload to the complete telescope rig
Compare the mount’s stated capacity with the total weight of the telescope and attached equipment, including cameras, adapters, and guiding gear. The CGX lists 55 pounds, while the GX35 lists 22 pounds and clarifies that its figure includes the counterweight. The iEXOS-100-2 description supplies no payload rating, so I would seek that information before choosing it for a specific telescope. A larger published number does not by itself establish tracking performance for every load; use the maker’s guidance for the intended imaging setup.
Read the full drive description
“Belt drive” is not the entire drive system. The GX35 pairs a synchronous belt with a 144-tooth worm gear; the CGX combines belt technology with high-torque servo motors; the iEXOS-100-2 uses stepper motor belt drives and clutched dual-axis worm gears. Those descriptions tell you something about how each mount is built, but the supplied details do not provide a shared tracking-accuracy measurement. I would compare stated tracking specifications from the manufacturer if precision requirements are the deciding factor.
Choose a control style you will use
The control system can shape setup and observing as much as the mount itself. The CGX includes a dedicated NexStar+ controller with a large object database and guided tours. The GX35 uses the MirroSky app on iOS or Android, while the iEXOS-100-2 uses ExploreStars and wireless connections with Apple, Android, or Windows tablets. If you prefer not to depend on a tablet, the supplied iEXOS details point to a mismatch; if you prefer tablet navigation, its wireless options are a distinguishing feature.
Account for portability and power
Only the GX35’s mount weight is specified here: 8.8 pounds. That makes it the most clearly documented portable choice, though it still needs an external 12V 3A power supply, and the full kit also includes a counterweight and shaft. The CGX’s tripod material and weight are not provided, so I would not assume how convenient it is to move based on capacity alone. Check what power equipment each complete setup requires and how the tripod, counterweights, and accessories affect the load you carry.
Check which imaging accessories are bundled
The GX35 is the only product in this group whose supplied description names both a guidescope and guide camera. That may simplify assembling a guided imaging kit, although buyers should verify compatibility with their imaging workflow. The CGX description emphasizes capacity and object control rather than bundled guiding hardware. The iEXOS-100-2 description says it has no focuser; that is not the same as a guide camera, so check the system contents and any separate optical accessories you need before purchase.
Frequently Asked Questions
What is the best equatorial mount with a belt drive in this comparison?
I rank the MirroSky GX35 first overall because it combines a lightweight stated mount weight with a belt and worm gear drive, plus an included guidescope and guide camera. It is not the right fit for every setup: its 22-pound payload listing includes the counterweight, and the CGX has a much higher stated 55-pound capacity. For a heavier telescope, the CGX is the more relevant choice.
Which of these mounts has the highest stated payload?
The Celestron CGX lists a 55-pound payload, the largest stated figure among these three products. The GX35 lists 22 pounds and says that capacity includes its counterweight. The supplied iEXOS-100-2 description does not state a payload rating, so I would confirm the limit for the intended telescope before choosing it.
Does a belt drive alone tell me how accurately a mount will track?
No. The descriptions pair belt drives with different systems: the GX35 adds a 144-tooth worm gear, the CGX uses high-torque servo motors, and the iEXOS-100-2 combines stepper motors with clutched dual-axis worm gears. These details help distinguish their designs, but the information provided does not offer a common tracking-accuracy figure. Compare manufacturer tracking specifications if that measurement is central to your decision.
Which option is best if I want app or tablet control?
The iEXOS-100-2 is the most explicit tablet-focused choice, with PMC-Eight control, WiFi and Bluetooth, and ExploreStars support for Apple, Android, and Windows tablets. The GX35 also has an app for iOS and Android. The CGX takes a different approach by including the NexStar+ hand controller, which may suit buyers who want a dedicated controller rather than depending on a smart device.
Which mount includes guiding equipment?
The MirroSky GX35 is the one whose listed package includes a 53mm ED guidescope and Sony IMX662 guide camera. The provided CGX and iEXOS-100-2 descriptions do not list those items as included. If guiding is part of your planned imaging setup, check package contents and compatibility before purchase, and remember that the GX35’s payload figure includes the counterweight.
Conclusion
I would choose the MirroSky GX35 for a portable imaging setup that benefits from bundled guiding, as long as the complete rig fits its stated payload. For a heavier telescope and a dedicated hand-controller experience, the Celestron CGX is the clearest match. The iEXOS-100-2 suits tablet users who value wireless ExploreStars control and quiet stepper belt drives, but I would verify its payload limit first. The right pick depends on whether your priority is an integrated compact kit, higher stated capacity, or a connected tablet workflow.
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