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QFocuser is available in two distinct models: the Standard Version and the High Precision Version.
The Standard Version mounts on the standard focusing axis of the telescope’s focuser mechanism, which is typical of most electric focusers on the market. The High Precision Version, on the other hand, attaches to the fine adjustment axis, offering enhanced accuracy.
QFocuser incorporates curves into its body design, adding a touch of elegance to its small size.
The QFocuser is exceptionally small!
Conventional electronic focusers generally use motors with gear reduction, which disables manual focusing after installation unless a clutch is disengaged. The High Precision QFocuser resolves this by using a direct-drive motor without gear reduction. This design allows you to make manual focus adjustments anytime, even without powering the unit or flipping any switches.
Another key advantage of the High Precision version is its ability to minimize system-wide backlash. Backlash in a focusing system isn’t limited to the motor–it also depends on the quality of the focuser's mechanical mount. Since the High Precision QFocuser has no internal reduction gears, it adds virtually zero mechanical backlash. When paired with a precision focusing mechanism, the total system can operate with near-zero backlash. Internal tests using NINA software have shown that autofocus runs flawlessly even with the backlash compensation set to zero.
QFocuser offers multiple mounting possibilities through its adjustable side and bottom mounting holes. Unlike rigid mounting plates with fixed-hole patterns, QFocuser features a customizable mounting structure, allowing you to freely position the fixing holes and adjust the bracket height for optimal compatibility with a wide range of telescope designs.
The QFocuser supports dual power options: via USB Type-C (5V) or 12V DC. In most setups, the 5V USB power is sufficient. Both Standard and High Precision models also include an external temperature sensor, catering to users who require active temperature feedback.
QFocuser is compatible with Windows (using ASCOM drivers) and Linux. The ASCOM driver integrates essential functions like movement control, custom position setting, limit switches, torque holding, and temperature monitoring. The focuser can also be controlled via third-party astronomy software platforms, offering versatile control options for any imaging workflow
| Feature | QFocuser (Standard Version) | QFocuser (High Precision Version) |
|---|---|---|
| Body Size (mm) | 43 × 39 × 50 | 43 × 39 × 50 (excluding button) |
| Weight | ~210g | ~265g |
| Motor | Reducing Motor | Non-reducing Motor |
| Backlash | Present (can be calibrated in software like NINA) | Almost zero backlash* |
| Max. Load Capacity | ~10 kg | ~7.5 kg |
| Manual Focusing After Installation | Not Supported | Supported |
| System Compatibility | Windows (ASCOM), Linux | |
| External Temperature Sensor | Supported | |
| Data Interface | USB 2.0 Type-C | |
| Power Supply | 5V / 12V | |
*Backlash performance may vary depending on mechanical setup.
