iOptron CEM25 iPolar - Simple Polar Alignment Without Fuss
With the iOptron CEM25 iPolar polar alignment becomes a piece of cake. You'll never have to crawl under the mount or search endlessly for the pole star again. The built-in camera shows you directly on your laptop screen where your mount is pointed - so you're perfectly aligned in minutes.

The iPolar works via a smart electronic camera that recognizes the position of the celestial pole and compares it to where your mount is pointing. You see both points on the screen, and with a few simple adjustments via the adjustment screws you bring them exactly in line. It's that simple.
No need to rotate the mount, and even in poor visibility conditions or light clouds, you can still align accurately. The software automatically calculates the exact position of the celestial pole based on date and time, ensuring you maximum precision.
Even when observing in the southern hemisphere, the iPolar works flawlessly. It even takes into account atmospheric effects at low latitudes. This keeps your alignment accurate no matter where you are.
You just connect it to your computer via USB - no drivers, no installation hassles. Everything works plug and play. For Mac users, there is also a special app available from the Mac App Store. And want to work on the go? With the iOptron iPolar Mobile app and the iMate Control Box, you can easily connect it to your iPhone or iPad.
The iPolar saves you time, frustration and mistakes. You're ready to track or shoot faster, and your tracking remains more stable - keeping your images clear and sharp.
What you notice in practice:
✓ Quickly align via your screen - no pole star needed
✓ Works even in light pollution or cloudy conditions
✓ Compact, light and easy to use
✓ Works worldwide, on both hemispheres
✓ Plug and play via USB
Specifications
Capacity
| Feature | Description |
|---|---|
| Field of view (°) | 13 |
| Position accuracy | 30″ |
Interfaces
| Feature | Description |
|---|---|
| Connection | USB 2.0 |
Sensor
| Feature | Description |
|---|---|
| Type | CMOS sensor |
| Pixel size (µm) | 3,75 |
| Bit depth (Bit) | 8 |
Compatibility
| Feature | Description |
|---|---|
| Operating Systems | Windows Vista / 7 / 8 / 8.1 / 10 |
| Suitable for mount | CEM25 |
General
| Feature | Description |
|---|---|
| Weight (g) | 70 |
| Series | iPolar |
| Type | Seeker |
| Design | Pole finder |







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