iOptron Guidescope - Accurate tracking, clear results
The iOptron Guidescope iGuider is your reliable partner for sharp astrophotos. This compact autoguider system combines a lightweight mini-guidescope with an accurate iGuider camera. Together they form a powerful duo that helps you track your telescope perfectly, keeping your shots clear and stable - even at long exposures.

Always sharp tracking
The 30 mm aperture and 120 mm focal length provide a bright, high-contrast image. Thanks to the high-quality lenses with dielectric anti-reflection coating, every star remains sharp and clearly visible. This allows your telescope to track flawlessly, frame after frame.
Smart design, ready to use
The iGuider is designed to work directly with iOptron mounts such as the CEM26, GEM28, CEM40 and GEM45. No adapters, no complicated settings - just plug in and start. That way you spend more time shooting and less time adjusting.

Compact and lightweight
At only 200 grams, you can easily take the guidescope anywhere. Ideal for mobile setups or observations in dark locations. Despite its small size, it delivers big performance.
Modern guiding without ST4
The iGuider supports pulse guiding, which means you don't need separate ST4 cables. Fewer cables, less chance of interference, and a neater setup.
Why you want the iOptron Guidescope
Because you want reliable, sharp guidance for every astrophotography session. The iGuider makes guiding simple, accurate and efficient - so you can focus entirely on capturing the cosmos in all its splendor.
Specifications
Optics
| Feature | Description |
|---|---|
| Design | Guidescope |
| Lens diameter | 30 mm |
| Focal length | 120 mm |
| Focal Ratio (f/) | 4 |
| Coating | Dielectric anti-reflective coating |
Camera
| Feature | Description |
|---|---|
| Sensor | 1/3″ CMOS |
| Resolution | 1280 × 960 pixels |
| Megapixel | 1.2 MP |
| Pixelsize | 3.75 µm |
| Resolution (field of view) | 6.44 arcseconds/pixel |
Connectivity
| Feature | Description |
|---|---|
| Connection | 1.25″ |
| Guiding type | Pulse guiding (not ST4) |
| Compatibility | CEM26, GEM28, CEM40*, GEM45* |
| (*CEM40/GEM45 require 6″ Vixen rail with 2×M3 threads) |
Physical
| Feature | Description |
|---|---|
| Weight | 200 g |
| Attachment | 19 mm rail (Vixen/GP level) |
General
| Feature | Description |
|---|---|
| Type | Autoguider system |
| Observation goals | Astrophotography |
| Recommended for | Beginners & advanced astrophotographers |





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