iOptron CEM120 iPolar Electronic Polar Finder
With the iOptron CEM120 iPolar Electronic Polar Finder pole alignment finally becomes easy, fast and comfortable. No more uncomfortable positions or endless peering through a small aperture. You see everything clearly on your laptop screen and align your mount perfectly in minutes.

The built-in camera shows exactly where the celestial pole is and where your mount is pointing. By simply adjusting the set screws of your CEM120, you bring both points together. This gives you an extremely precise alignment - with no guesswork and no stress.
The iPolar does the heavy math for you. It automatically determines the exact position of the celestial pole based on date and time. Even if the Pole Star is not visible, the software helps you still align accurately. Thanks to the sensitive camera and wide field of view, the system works even in light pollution or thin cloud cover.
Accurate wherever you are
The iPolar takes everything into account - from atmospheric refraction to geographic location. Whether you are observing in the northern or southern hemisphere, you will always get a reliable alignment.
Smart and user-friendly
The iPolar is designed for ease of use. No free view of the Pole Star required, no complicated settings. The clear software guides you step by step through the process. Within minutes you are ready to track or photograph.
Works with Apple devices
Are you using a Mac, iPhone or iPad? Then you can easily connect the iPolar via the dedicated macOS app or the iOptron iPolar Mobile app. For iOS, you'll need the iMate Astronomy Control Box, which lets you quickly connect between the camera and your device.
Note that the macOS software is paid and iOS requires additional accessories. Check in advance that your device meets the system requirements for smooth operation.
Our Tip:
Each iPolar is designed for a specific iOptron mount. This version fits perfectly with the CEM120 - always choose the right version for your model.
Specifications
Capacity
| Feature | Value |
|---|---|
| Field of view (°) | 13 |
| Position accuracy | 30″ |
Interfaces
| Feature | Value |
|---|---|
| USB connector | USB 2.0 |
Sensor
| Feature | Value |
|---|---|
| Sensor type | CMOS |
| Pixel size (µm) | 3,75 |
| Bit depth | 8-bit |
Compatibility
| Feature | Value |
|---|---|
| Systems supported | Windows Vista / 7 / 8 / 8.1 / 10 |
| Suitable for mount | CEM120 |
General
| Feature | Value |
|---|---|
| Weight (g) | 70 |
| Series | iPolar |
| Type | Seeker |
| Design | Electronic pole finder |







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