iOptron iAFS3 2″ - Ultra-precise electronic focuser
The iOptron iAFS3 2″ automatically brings sharp images to your telescope. It mounts directly along the optical axis, without complicated mounts that can wobble. Thanks to iLock™ technology, your focus remains stable even in heavy astro setups.
You can choose from three focus modes: manual, motorized or via your computer. The manual focus wheel lets you get close to focus quickly. The built-in temperature sensor automatically adjusts focus as temperatures change, so stars and planets always stay in focus. The solid metal housing and dirt-resistant surface ensure that the focuser remains reliable even in cold or dusty conditions.
The iAFS3 2″ has an accuracy of 0.4 µm. It comes with a 2-inch visual back and USB-C cables for easy connection to your computer. Compatible with ASCOM & INDI, it is ideal for visual use and astrophotography.
Expected
✓ Razor-sharp constellations and planets
✓ Quick change between manual and motorized focusing
✓ Automatic compensation for temperature fluctuations
✗ Only suitable for systems with 2″ connection or suitable adapters
Included
- iAFS3 focusing device
- 2″ Visual Back (P-FA20-VB)
- 2x USB 2.0 (Type-C) cable
Specifications
Capacity
| Feature | Description |
|---|---|
| Carrying capacity (kg) | 5 |
| Power supply | 5V via USB |
| Connection | USB 2.0 Type-C |
Focus electronically
| Feature | Description |
|---|---|
| Software | Compatible with ASCOM & INDI |
| Free passage (mm) | 76 |
| Drawtube travel (mm) | 30 |
| Engine Type | Stepper motors |
| Ocular connection | 2″ |
| Suitable for | Depending on the adapter |
Details
| Feature | Description |
|---|---|
| Controllable via PC | Yes |
| Rotatable | Yes |
| Power supply | No |
| Cable | USB |
| Motor-powered | Yes |
| USB Hub | 2x USB 2.0 |
| Temperature sensor | Yes |
General
| Feature | Description |
|---|---|
| External dimensions LxWxH (cm) | 13.3 x 10.8 x 9.4 |
| Weight (g) | 1062 |
| Series | iAFS |
| Type | Focuser |
| Design | Motors & controls |









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