The iOptron HAE43B takes the 44-pound counterweight-free capacity of the HAE43 platform and adds something most imaging mounts still expect you to supply separately: the computer that runs the imaging session.
The mount head weighs just 12.8 lb (5.8 kg), yet iOptron rates it to carry 44 lb (20 kg) without a counterweight and up to 55 lb (25 kg) with the optional counterweight system. Built into the mount is iOptron's iMate computer, a 64-bit ARM-based controller preloaded with KStars, Ekos, INDI drivers, and iPolarServer.
That gives the HAE43B a different purpose from the HAE43C. Both provide the same basic strain-wave mount platform and substantial payload capacity. The B version adds the ability to control much of the imaging system from the mount itself — camera, guider, focuser, filter wheel, plate solving, sequencing, and image capture — without leaving a laptop beside the telescope all night.
If you already have a computer and software workflow you prefer, you are not locked into iMate. The HAE43B can also be controlled directly through USB-C using an external computer.
Features
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Built-in iMate imaging computer. A 64-bit ARM-based computer comes preloaded with KStars, Ekos, INDI drivers, and iPolarServer, providing an open-source environment for controlling compatible astronomical equipment.
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44 lb counterweight-free payload. Carry up to 20 kg (44 lb) without bringing a traditional counterweight shaft and stack of weights into the field.
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Up to 55 lb with a counterweight. Add the optional counterweight system when a heavier or more demanding telescope configuration calls for additional capacity.
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Only 12.8 lb for the mount head. Serious payload capacity in a mount that remains genuinely portable.
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Strain-wave gearing on both axes. The RA axis uses a 640:1 reduction and DEC 480:1, providing high torque from a compact drive system.
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32GB of onboard storage. iMate includes 32GB of eMMC storage and supports a microSD card up to 64GB for additional image and system storage.
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Integrated USB connections. One USB 3.0 port and two USB 2.0 ports allow cameras, guide cameras, focusers, filter wheels, and other compatible equipment to connect directly to iMate.
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Three 12V accessory outputs. Two are software-switchable, allowing iMate to handle part of the power distribution for the imaging system as well as the data connections.
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Remote operation over Wi-Fi. Access the computer inside the mount from Windows, macOS, Linux, iOS, or Android rather than leaving a separate computer beside the telescope.
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Direct USB-C mount control. Prefer NINA, another mini PC, or your existing imaging system? Connect directly to the mount base and bypass iMate as the primary controller.
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Equatorial and Alt-Az operation. Use EQ mode for tracking and astrophotography or configure the mount in Alt-Az mode for visual observing.
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Dual Vixen/Losmandy-D saddle. Accepts either of the two common astronomy dovetail standards.
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Integrated ST-4 autoguider port. Traditional guiding is supported in addition to software-based guiding through compatible imaging software.
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Electronic friction brake. Designed to stop mount movement safely during a planned or unexpected interruption in power.
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Automatic zero-position search. Built-in sensing allows the mount to locate its reference position electronically.
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Optional iPolar. iOptron's electronic polar-alignment camera can be added when you want a dedicated polar-alignment solution.
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Carrying case included. A fitted case protects the mount during transport and makes sense for a system designed to travel.
The Imaging Computer Is Already in the Mount
The most interesting part of the HAE43B isn't simply that it uses strain-wave gearing. The HAE43C already does that. What separates the B version is iMate.
Astrophotography rigs have a habit of accumulating boxes. The telescope gets a cooled camera, then a guide camera, electronic focuser, filter wheel, USB hub, power distribution, and eventually a laptop, mini PC, or dedicated astronomy controller to run everything.
iMate moves much of that control hardware into the mount itself.
Its onboard computer comes preloaded with KStars for planetarium and target selection, Ekos for imaging automation, and INDI drivers for compatible astronomical equipment. Once the system is configured, Ekos can handle GoTo, plate solving, autofocus, guiding, capture sequences, and other parts of an automated imaging session while the software itself runs inside the mount.
The iMate also provides one USB 3.0 port, two USB 2.0 ports, and three 12V outputs, so much of the equipment can connect close to the telescope instead of requiring another hub and power box hanging from the tripod.
For an imaging system that gets assembled and taken down regularly, fewer separate components can make a meaningful difference.
Remote Control Without Leaving a Laptop Outside
The computer is inside the HAE43B, but you still need a way to interact with it.
iMate creates its own Wi-Fi network and can be accessed remotely from a computer, tablet, or other compatible device. The applications run on the iMate itself; your remote device is simply giving you access to the desktop and controls.
That means the laptop does not have to remain tethered to the telescope all night. Once the equipment profile and imaging sequence are configured, the onboard computer can continue handling the session at the mount.
This is particularly useful for a portable setup where reducing hardware and cable clutter is part of the reason for choosing a strain-wave mount in the first place.
You Are Not Locked Into iMate
An integrated computer is much more useful when it remains optional.
The HAE43B can also be controlled directly through the USB-C port on the mount base. Windows users can work through iOptron Commander and ASCOM, while compatible third-party INDI software provides additional control options on other platforms.
If you already have a NINA-based mini PC, ASIAIR-compatible workflow, Raspberry Pi, or another control system you prefer, you can continue using it rather than rebuilding the entire imaging setup around iMate.
That makes iMate an additional capability instead of a software commitment.
44 Pounds Without Counterweights
Underneath the computer is still the feature that makes the HAE43 platform unusual: 44 pounds of counterweight-free payload in a mount weighing less than 13 pounds.
That leaves room for a substantial telescope and imaging train without requiring the traditional shaft and stack of counterweights every time you set up. Add the optional counterweight system and the rated capacity rises to 55 lb.
There is an important qualification to those numbers. iOptron bases the payload rating on the center of gravity being approximately 200mm from the RA rotation axis. A compact 35-pound SCT or astrograph and a long 35-pound refractor do not present the same load to the mount.
That makes telescope geometry just as important as scale weight. Compact astrographs, SCTs, and reasonably sized refractors are particularly natural matches. As tube length and moment arm increase, leaving additional margin below the published payload becomes increasingly sensible.
The optional counterweight gives you another tool when a particular configuration benefits from it. Counterweight-free is a capability, not a requirement.
Guiding the Standard HAE43B
The standard HAE43B does not include the high-precision RA encoder found in the HAE43B-EC.
iOptron specifies the underlying strain-wave drive at less than ±18 arcseconds of periodic error, with a 270-second RA gear period. For demanding long-exposure astrophotography, plan on guiding the standard B model when the image scale requires it.
Strain-wave mounts can benefit from a somewhat different guiding approach than conventional worm-drive mounts because the tracking rate can change relatively quickly through portions of the gear cycle. Shorter guide exposures are therefore common, but there is no single setting that belongs on every HAE43B.
Seeing, focal length, guide-camera sensitivity, telescope geometry, and the support underneath the mount all affect the result. Tune the guider from the stars in your actual exposures rather than trying to reproduce someone else's RMS number.
From the Cloudy Nights Community
The conversation around iMate on Cloudy Nights is interesting because users see the same appeal that is obvious on paper: combining the mount and imaging computer can make a portable system considerably cleaner.
Members familiar with KStars, Ekos, and INDI generally like the open architecture and the ability to use cameras, focusers, filter wheels, and other equipment from different manufacturers rather than being restricted to a single hardware ecosystem.
There is a learning curve, however. Community reports from owners using the iMate platform show that getting individual cameras, guide cameras, focusers, and INDI drivers configured can require some initial work. One owner described the Wi-Fi performance and reduced cabling positively while also working through device-connection and guiding configuration issues.
That is worth understanding before choosing the B model. iMate is closer to having a small Linux astrophotography computer built into the mount than to using a closed, one-button appliance. For an experienced imager who likes KStars, Ekos, INDI, and the freedom to configure the system, that openness can be a major advantage.
And if iMate doesn't fit the workflow you eventually settle on, direct USB-C control means the mount itself remains useful with an external computer. That flexibility is probably the strongest argument for the design.
EQ for Imaging, Alt-Az for Visual
The HAE43B can operate in either equatorial or Alt-Az mode.
In equatorial mode, proper polar alignment gives the mount the geometry required for long-exposure astrophotography, while iMate can handle the rest of the imaging workflow.
Switch to Alt-Az mode and the same head becomes a high-capacity GoTo visual mount without requiring a conventional polar-alignment routine.
That gives a large refractor or SCT a useful second life when the camera stays inside. The same telescope that spends one night gathering several hours of data can spend the next pointed at the Moon, planets, double stars, or deep-sky objects with an eyepiece.
What's Included
- iOptron HAE43B strain-wave AZ/EQ mount head
- Integrated iMate computer
- Dual Vixen/Losmandy-D dovetail saddle
- 12V AC/DC power adapter for indoor use
- USB-C computer/firmware cable
- Carrying case
Available separately: iPolar electronic polar scope, Go2Nova 8411 OLED hand controller, LiteRoc tripod, Tri-Pier, counterweight shaft and counterweight, MiniPier extension, iGuider, and other compatible accessories.
Frequently Asked Questions
What makes the HAE43B different from the HAE43C?
The defining feature of the HAE43B is its integrated iMate astronomy computer. Both mounts use the same basic dual strain-wave platform and have the same published payload capacity, but the B model adds KStars, Ekos, INDI device control, onboard storage, USB connectivity, and accessory power.
Does the HAE43B have a high-precision RA encoder?
No. The standard HAE43B does not include the RA encoder. If you want the HAE43 with both iMate and the high-precision RA encoder, that model is the HAE43B-EC.
What can iMate control?
Through KStars, Ekos, and INDI drivers, iMate can work with compatible imaging cameras, guide cameras, electronic focusers, filter wheels, and other astronomical equipment in addition to controlling the mount itself.
Do I need a laptop?
You do not need a separate computer sitting beside the telescope if you build the system around iMate. You will still use another device to access and configure the onboard computer remotely, but the imaging applications themselves run inside the mount.
Do I have to use iMate?
No. The HAE43B can also be controlled directly through USB-C using an external computer and compatible ASCOM or INDI software.
Does it have an ST-4 autoguider port?
Yes. iOptron lists an integrated ST-4-compatible autoguider port on the current HAE43B. Software-based guiding through Ekos, ASCOM, or other compatible systems is also available.
Does it include iPolar?
No. iPolar is an optional accessory on the current HAE43B. The iMate software includes iPolarServer for use when a compatible iPolar camera is connected.
How much can it carry?
iOptron rates the HAE43B for 44 lb (20 kg) without a counterweight and up to 55 lb (25 kg) with the optional counterweight system. The rating assumes the payload center of gravity is approximately 200mm from the RA axis, so telescope geometry matters along with total weight.
Does a tripod come with it?
No. The HAE43B is supplied without a tripod or pier, allowing you to choose the support that best matches your telescope and whether the mount will be portable or permanently installed.
Can I use it for visual observing?
Yes. The HAE43B can operate in Alt-Az mode for visual use as well as equatorial mode for astrophotography.
Final Thoughts
The HAE43B is not the encoder version of the HAE43. It is the integrated-computer version, and that gives it a very different reason to exist.
You still get the impressive part of the HAE43 platform: 44 pounds of counterweight-free payload in a mount head weighing only 12.8 pounds. What the B adds is the ability to build the rest of the imaging system around the mount itself.
KStars, Ekos, INDI, onboard storage, USB connections, and accessory power are already there, allowing the camera, guider, focuser, filter wheel, and mount to become part of one compact field system.
And because direct USB-C control remains available, choosing iMate doesn't close off the rest of the astrophotography world. Use the onboard computer when its integration makes sense. Use your own computer when you prefer another workflow.
For the imager who wants the HAE43's substantial payload but also wants fewer separate boxes and cables to carry into the field, that is the reason to choose the HAE43B.
