Choosing among equatorial mounts with belt drive systems means weighing payload and control against portability and setup effort. I put the Celestron CGX first for its 55-pound stated capacity and built-in NexStar+ GoTo controls, while the MirroSky GX35 stands out for bundling a guide scope and imaging camera. The Explore Scientific iEXOS-100-2 takes a different route: quiet belt-driven stepper motors and tablet-based control in a mount aimed at lighter setups.
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The tradeoff is not simply belt drive versus no belt drive: all three use belts, but they pair them with different gearing and control systems. I’d choose by the telescope load and the kind of observing or imaging planned. The CGX is the strongest choice for heavier equipment, the GX35 offers the most integrated imaging equipment, and the iEXOS-100-2 is the more focused pick for a smaller, tablet-controlled rig. Check the GX35’s conflicting payload figures before deciding how much equipment to put on it.
Complete the kit
Key Takeaways
- Celestron CGX: the clearest choice for heavier telescope setups, with a stated 55-pound payload and included tripod.
- MirroSky GX35: includes a 53 mm ED guide scope and Sony IMX662 camera, but its listing gives conflicting payload capacities.
- Explore Scientific iEXOS-100-2: uses quiet belt-driven stepper motors with clutched dual-axis worm gears and tablet-based ExploreStars control.
- Belt drive is only one part of tracking performance; gearing, payload, balance, alignment, and control options also affect the fit.
- The CGX favors capacity and hand-controller operation, while the GX35 and iEXOS-100-2 put more emphasis on app or tablet control.
| Celestron CGX Computerized German Equatorial Mount and Tripod |  | Best Overall for Higher-Payload Setups | Mount type: Computerized German equatorial | Payload capacity: 55 lb | Motors: High-torque servo | VIEW ON AMAZON | See Our Full Breakdown |
| MirroSky GX35 Smart Equatorial Telescope Mount with Guide Scope and Imaging Module |  | Best Integrated Imaging Bundle | Mount modes: Equatorial and Alt-AZ | Payload capacity: Conflicting listing: 22 lb (10 kg) and 28.5 lb | Weight: 27.9 lb | VIEW ON AMAZON | See Our Full Breakdown |
| Explore Scientific iEXOS-100-2 PMC-Eight Equatorial Tracker Mount and Tripod |  | Best for Tablet-Controlled, Lighter Rigs | Mount type: Equatorial mount | Control system: Explore Scientific PMC-Eight with eight independent CPUs | Drive system: Clutched dual-axis worm gears with belt-driven stepper motors | VIEW ON AMAZON | See Our Full Breakdown |
| equatorial mounts with belt drive system | Drive system | Mount type | Payload capacity | Included |
|---|---|---|---|---|
| Celestron CGX Computerized Ger | Belt drive | Computerized German equatorial | 55 lb | Tripod |
| MirroSky GX35 Smart Equatorial | RA worm gear with 144-tooth main gear and synchronous belt drives | — | Conflicting listing: 22 lb (10 kg) and 28.5 lb | — |
| Explore Scientific iEXOS-100-2 | Clutched dual-axis worm gears with belt-driven stepper motors | Equatorial mount | — | Mount and tripod |
More Details on Our Top Picks
Celestron CGX Computerized German Equatorial Mount and Tripod
I rank the Celestron CGX first because it is the most clearly specified option for a substantial telescope load: its stated capacity reaches 55 pounds, and it includes a tripod. Its high-torque servo motors work with a belt drive, while the NexStar+ hand controller supplies a 40,000-object database, guided tours, and custom object filters. That combination makes the CGX the most direct choice here for someone who wants a computerized equatorial mount and a broad object-selection system without relying on a tablet app.
Compared with the MirroSky GX35, the CGX has a much higher stated payload and a conventional hand controller, but it does not come with the GX35’s guide scope and imaging camera. Against the iEXOS-100-2, the CGX offers a published capacity and more explicit bundled control features, while the Explore Scientific option emphasizes quiet belt-driven stepper motors and tablet operation. These distinctions make the CGX a stronger fit for a heavier or more complete observing rig, not automatically a better fit for every imaging workflow.
The main compromise is that the supplied description gives little detail about the CGX drive layout beyond the belt drive and high-torque servos. Buyers comparing tracking behavior closely may want more information about setup, guiding, and compatibility before committing. Its capacity also does not remove the need to account for the full load, including accessories. I’d choose it when load capacity and onboard GoTo control matter more than portability or included imaging sensors.
Pros:- Stated payload capacity of 55 pounds
- Belt drive paired with high-torque servo motors
- NexStar+ controller lists 40,000 objects, guided tours, and custom filters
- Tripod is included
Cons:- The supplied description gives limited detail about the belt-drive arrangement
- No guide scope or imaging camera is listed among the included components
- The mount’s capacity and tripod inclusion may be more than a small, travel-focused rig needs
Best for: Observers or imagers building a heavier telescope setup who want a stated 55-pound capacity, included tripod, and hand-controller-based object selection.
Not ideal for: Buyers seeking a compact, lightweight travel mount or a ready-bundled guide scope and imaging camera.
- Mount type:Computerized German equatorial
- Payload capacity:55 lb
- Motors:High-torque servo
- Drive system:Belt drive
- Hand controller:NexStar+
- Object database:40,000 objects
- Included:Tripod
Our verdict“I’d choose the CGX as the most broadly capable pick here when a higher stated payload and dedicated GoTo hand controller outweigh portability and bundled imaging accessories.”
MirroSky GX35 Smart Equatorial Telescope Mount with Guide Scope and Imaging Module
The MirroSky GX35 is the most self-contained imaging-focused package in this group. It combines equatorial and Alt-AZ modes with a 53 mm ED guide scope and an integrated Sony IMX662 CMOS camera. Its tracking system pairs a 144-tooth RA main gear and worm gear with synchronous belt drives, and the MirroSky app runs on iOS and Android. For someone who wants more than a mount body, the included imaging and guiding components set it apart from the CGX and iEXOS-100-2.
That bundle comes with an important question mark: the product information lists a payload of 22 pounds (10 kg) and 28.5 pounds. I would not plan around the higher figure without confirming which capacity applies. The listed 27.9-pound mount weight also gives this option a portability drawback, especially when compared with a small tracker-style system. The CGX has the clearest capacity claim at 55 pounds; the GX35 instead trades that headroom for included imaging hardware and two mount modes.
The GX35 is a reasonable choice for buyers who value an integrated camera and guide scope, and who want app control rather than a hand controller. However, its 2.1 MP, 1/2.8-inch camera specification does not, by itself, establish that it suits every imaging target or workflow. I’d verify the actual payload and check how the app and camera fit the rest of the intended setup before buying. Compared with the iEXOS-100-2’s tablet-centric control and belt-driven stepper motors, the GX35 is the more bundled option, but its conflicting capacity information makes it the least straightforward to size.
Pros:- Includes a 53 mm ED guide scope and Sony IMX662 imaging camera
- Offers both equatorial and Alt-AZ mount modes
- RA worm gearing works with synchronous belt drives
- MirroSky app supports iOS and Android
Cons:- Payload is inconsistently listed as 22 lb and 28.5 lb
- Listed mount weight is 27.9 lb, which may hinder portability
- Bundled camera specifications do not establish suitability for every imaging workflow
Best for: A buyer seeking an app-controlled mount with equatorial and Alt-AZ modes plus a bundled guide scope and imaging camera.
Not ideal for: Anyone who needs a verified payload figure, a particularly light travel setup, or a mount without integrated imaging equipment.
- Mount modes:Equatorial and Alt-AZ
- Payload capacity:Conflicting listing: 22 lb (10 kg) and 28.5 lb
- Weight:27.9 lb
- Guide scope:53 mm ED
- Camera:Sony IMX662 CMOS, 2.1 MP, 1/2.8-inch sensor
- Drive system:RA worm gear with 144-tooth main gear and synchronous belt drives
- Power input:12 V, 3 A
- Included accessories:Guide scope, camera, connecting cables, power supply, counterweight, and counterweight shaft
- App compatibility:iOS and Android
Our verdict“I’d pick the GX35 for its unusually complete imaging bundle, but only after confirming its usable payload and accepting its listed weight.”
Explore Scientific iEXOS-100-2 PMC-Eight Equatorial Tracker Mount and Tripod
The Explore Scientific iEXOS-100-2 is the specialist pick for buyers who value quiet belt-driven stepper motors and tablet-based control. Its PMC-Eight system uses eight independent CPUs, and the drive combines belt-driven motors with clutched dual-axis worm gears. The ExploreStars app supports Apple, Android, and Windows tablets for alignment and GoTo control. That is a different emphasis from the CGX’s NexStar+ hand controller and published 55-pound capacity: the iEXOS-100-2 makes its case through control architecture, clutches, and a tablet-centered workflow.
The clutched axes support precise balancing, a useful feature when a telescope and accessories need to sit correctly on the mount. The RA-axis sight hole and altitude adjustment provide tools for polar alignment, but this mount does not include a polar scope in the described alignment method. That makes alignment a less direct prospect for buyers who specifically want a dedicated polar scope. Unlike the GX35, it also does not come with a guide scope or camera, so buyers assembling an imaging system should account for those parts separately.
There is no payload capacity in the supplied specifications, which limits how confidently I can match it to a particular telescope. I would not rank it above the CGX for a large load, nor above the GX35 for an all-in-one imaging package. Its appeal is narrower but clear: choose it for a smaller setup where quiet belt-driven stepper operation, clutched balancing, and broad tablet compatibility are more relevant than a published high payload or bundled sensors. Skip it if a verified capacity figure or polar-scope alignment is a requirement.
Pros:- Quiet belt-driven stepper motors paired with dual-axis worm gears
- PMC-Eight system uses eight independent CPUs
- ExploreStars app supports Apple, Android, and Windows tablets
- Clutched axes support precise balancing
Cons:- The supplied specifications do not state a payload capacity
- Polar alignment is described without a polar scope
- Guide scope and imaging camera are not listed as included
Best for: Owners of a lighter telescope setup who prefer tablet-based alignment and GoTo control, quiet stepper motors, and clutched axes for balancing.
Not ideal for: Buyers requiring a published payload capacity, a supplied guide scope or camera, or a polar scope for alignment.
- Mount type:Equatorial mount
- Control system:Explore Scientific PMC-Eight with eight independent CPUs
- Drive system:Clutched dual-axis worm gears with belt-driven stepper motors
- App compatibility:Apple, Android, and Windows tablets
- Alignment features:RA-axis sight hole and altitude adjustment; no polar scope listed
- Included:Mount and tripod
- Focus type:No focuser
- Model number:ES-iEXOS-100-02
Our verdict“I’d choose the iEXOS-100-2 for a lighter, tablet-controlled rig where quiet belt-driven motors and clutched balancing matter more than bundled imaging gear or a stated payload.”
How We Picked
I ranked these three mounts by how clearly their belt-drive designs serve a distinct buyer, rather than treating a belt as a guarantee of tracking performance. I compared the stated payload capacity, the drive components paired with the belt, the control method, included equipment, and the setup demands apparent from the supplied specifications. Payload matters because a mount can carry only a practical imaging or observing system if it has room for the telescope and accessories together.
I also gave weight to what arrives with each mount. The CGX includes a tripod and NexStar+ controller; the GX35 bundles a guide scope, camera, counterweight, and related accessories; and the iEXOS-100-2’s differentiators are its PMC-Eight electronics, clutched axes, and ExploreStars tablet app. Those inclusions change how much additional gear a buyer may need to plan for.
There are limits to the available product information. The GX35 description lists both 22 pounds and 28.5 pounds as payload capacities, so I treat its capacity as uncertain rather than choosing the more favorable figure. The iEXOS-100-2 listing does not state a payload, and the CGX description does not identify its belt-drive arrangement in further detail. I do not infer tracking accuracy, imaging limits, or compatibility beyond the supplied facts. The ranking reflects the clarity and breadth of the stated specifications, not claims of hands-on testing.
| equatorial mounts with belt drive system | Mount type | Drive system | Included | App compatibility |
|---|---|---|---|---|
| Celestron CGX Computerized Ger | Computerized German equatorial | Belt drive | Tripod | — |
| MirroSky GX35 Smart Equatorial | — | RA worm gear with 144-tooth main gear and synchronous belt drives | — | iOS and Android |
| Explore Scientific iEXOS-100-2 | Equatorial mount | Clutched dual-axis worm gears with belt-driven stepper motors | Mount and tripod | Apple, Android, and Windows tablets |
Factors to Consider When Choosing Equatorial Mounts With Belt Drive Systems
I’d start with the actual telescope-and-accessory load, then decide whether the priority is controller style, bundled imaging equipment, or a clear capacity specification. A belt drive alone does not settle those questions: the three picks pair belts with different motors, gears, controls, and included components.
Match Capacity to the Full Setup
Count the telescope, camera, guide equipment, adapters, and other components that will ride on the mount. The CGX states a 55-pound payload, giving it the clearest published headroom in this group. The GX35’s listing conflicts between 22 pounds and 28.5 pounds, so verify its capacity before choosing a load. The iEXOS-100-2’s supplied specifications give no payload figure; I would seek that information before pairing it with a heavier telescope rather than guessing from its name or features.
A published maximum is not a reason to ignore balance or setup suitability. For imaging, the total load includes more than the optical tube. Buyers should match the capacity information to their entire intended rig and confirm the manufacturer’s guidance for that use.
Understand What the Belt Is Paired With
These mounts all use belt-drive elements, but they are not identical mechanisms. Celestron lists high-torque servo motors and a belt drive; MirroSky specifies synchronous belts alongside RA worm gearing and a 144-tooth main gear; Explore Scientific pairs belt-driven stepper motors with clutched dual-axis worm gears. Those details help explain the design differences, but the supplied descriptions do not provide comparable tracking-error figures. I would not select one on belt drive alone or assume the belt guarantees a specific imaging result.
Instead, compare the rest of the drive and control system with your intended setup. The iEXOS-100-2 calls out quiet stepper motors and clutches, while the GX35 names its RA gear arrangement. The CGX provides a high payload and computer control, but less detail about the belt layout. Ask for further technical information if tracking specifications are central to your purchase.
Choose the Control Style You Will Actually Use
The CGX includes a NexStar+ hand controller with a 40,000-object database, guided tours, and custom filters. It suits buyers who want named-object selection directly through a dedicated controller. The GX35 uses the MirroSky app on iOS and Android, while the iEXOS-100-2 relies on ExploreStars for Apple, Android, and Windows tablets. App-based control may suit a buyer already planning to use a compatible tablet, but verify device compatibility and the intended workflow before purchase.
Do not assume all three systems offer the same controls simply because each is computerized or app-compatible. Their supplied descriptions emphasize different features: the CGX highlights its object database, the iEXOS-100-2 describes alignment and GoTo functions, and the GX35 identifies its mobile app. Pick according to the functions and device you want at the telescope.
Weigh Bundled Gear Against Portability
The GX35 is the clear bundle leader, arriving with a 53 mm ED guide scope and Sony IMX662 camera, along with a counterweight, shaft, power supply, cables, and other listed accessories. That may reduce the number of separate components a buyer needs to source, though the mount itself is listed at 27.9 pounds and its payload information needs confirmation. Its accessories do not make the package lightweight by default.
The CGX includes a tripod, while the iEXOS-100-2 listing also identifies a tripod; neither is described as including the GX35’s camera-and-guide-scope package. Before deciding, list the equipment you already own and what you must add. A broader bundle can be convenient, but it can also include gear that does not suit your preferred imaging workflow.
Plan for Polar Alignment and Balancing
Equatorial mounts need alignment with the sky’s apparent rotation, and the details supplied here vary. Explore Scientific lists an RA-axis sight hole and altitude adjustment, but says the described setup lacks a polar scope. The CGX and GX35 descriptions do not provide equivalent polar-alignment details, so I would not infer that their methods are identical or more convenient.
The iEXOS-100-2’s clutched axes are a specific advantage for balancing, but balance still takes attention when equipment changes. For the GX35, confirm the acceptable load before adding accessories; for the CGX, include the full payload in your planning. Ask how the chosen mount supports your preferred alignment method and whether additional tools are needed.
Frequently Asked Questions
What does a belt drive do on an equatorial mount?
A belt drive transfers motor movement into the mount’s tracking mechanism. The three options here pair belts with different hardware: the CGX lists high-torque servo motors, the GX35 combines synchronous belts with RA worm gearing, and the iEXOS-100-2 uses belt-driven stepper motors with dual-axis worm gears. The product details do not provide directly comparable tracking-accuracy measurements, so I would use the rest of the mount specifications and the intended workload to make the choice.
Which of these mounts has the highest stated payload?
The Celestron CGX has the clearest and highest stated capacity in the supplied product information at 55 pounds. The GX35 listing contains conflicting capacities of 22 pounds and 28.5 pounds, so confirm its figure before loading equipment. The iEXOS-100-2 listing does not state a payload capacity, and I would not estimate one from the other features.
Which mount includes a guide scope and imaging camera?
The MirroSky GX35 is the only one of these three described as including both a 53 mm ED guide scope and an integrated Sony IMX662 imaging camera. Its listed accessories also include a counterweight, counterweight shaft, cables, and power supply. The CGX includes a tripod, and the iEXOS-100-2 listing describes a mount and tripod, but neither is listed with the GX35’s camera-and-guide-scope combination.
Is the iEXOS-100-2 suitable for someone who wants polar-scope alignment?
The supplied description lists an RA-axis sight hole and altitude adjustment for polar alignment, but it says alignment is done without a polar scope. If a dedicated polar scope is a firm requirement, I would not assume this mount meets it. The provided details do not spell out equivalent alignment hardware for the CGX or GX35, so check the specifications for those mounts as well.
Should I choose an app-controlled mount or a hand-controller mount?
I’d choose based on the device and workflow I want beside the telescope. The CGX’s NexStar+ hand controller includes a large object database, guided tours, and custom filters. The GX35 uses an iOS or Android app, while the iEXOS-100-2’s ExploreStars app supports Apple, Android, and Windows tablets. Confirm that your device is compatible and that the listed control functions suit your observing or imaging plans.
Conclusion
For a heavier telescope setup, I’d start with the Celestron CGX: it has the strongest stated payload here, a tripod, and a dedicated controller with a large object database. For a buyer who wants imaging hardware bundled with the mount, the MirroSky GX35 is the more complete package, but I would verify its conflicting capacity figures and account for its listed weight before choosing it. For a lighter rig built around tablet control, the Explore Scientific iEXOS-100-2 offers quiet belt-driven steppers, clutched axes, and broad tablet compatibility; I would first confirm its payload and make sure its polar-alignment method suits my plans.
My ranking favors the CGX as the most straightforward all-around choice because its stated payload and controller features are clearer than the other options. The GX35 could suit a different buyer better when bundled camera gear is the priority, while the iEXOS-100-2 is compelling for a more specialized tablet-driven setup. Match the mount to the actual load and control workflow, not just the presence of a belt drive.
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