QHY Q-Focuser Electronic Automatic Focuser

QHY Q Focuser Overview

Q Focuser incorporates curves into its body design, adding a touch of elegance to its small size.

The dimensions of QFocuser's main body are just 43mm x 39mm x 50mm, making it 8-15mm shorter than similar products in the market. Its curved surface design enhances its lightness and elegance, also reducing balancing chalanges and interference issues for the equipment.

QHY Q Focuser Review

Agena Astro affiliate Cuiv the Lazy Geek shared this QHY Q-Focuser Review:

Two Versions Depending on your Needs

Please note: Customers have reported that the High Precision Version does not have enough torque to turn a standard single speed focuser.  If you have a single speed focuser we recommend the Standard Version.

QFocuser comes in two versions: Standard Version (sold separately) and High Precision Version (this item).

The Standard version is designed to be installed on the side of the standard adjustment axis of the telescope focusing mechanism. This is the same with most focusers available in the market. The High Precision version is installed on the other side — the precise adjustment axis of the telescope focusing mechanism.

Most electric focusers use a motor and reducing gears and once installed on the telescope manual focusing is not possible. However, the High Precision QFocuser is equipped with a non-reducing motor, allowing it to be manually adjusted even after installation on the telescope, without the need for a power connection or a clutch switch.

Another advantage of QFocuser High Precision Version is that it allows the entire system to achieve almost zero backlash. Backlash calculations involve the entire focusing system, including the focus motor mount, not just the electronic focuser itself. Backlash will exist if there are mechanical gears in the focusing system. Since the High precision QFocuser uses a non-reducing motor (i.e., no mechanical reduction gears) the added backlash from the motor is almost zero. Then, if a good focusing mount is used, the entire focusing system will operate with almost zero backlash. According to our test in NINA, with the backlash set to 0 in the Autofocus settings, the autofocus process runs smoothly.

Multiple Installation Options

QFocuser features several holes on its bottom and side, providing a variety of fixing methods. Unlike mounting plates with fixed holes, QFocuser adopts a flexible structure where the fixed holes position and mounting plate height can be freely adjusted to achieve the best compatibility with your telescope. This allows for compatibility with a very wide range of telescopes, and should mount to nearly any standard focuser. You can find installation instructions at the bottom of this page.

Software and Interface

QFocuser can be powered in two ways: TypeC-5V and 12V DC. The USB 5V power is enough in most cases. For heavier focuser loads, a 12v power supply can be used. Both the standard version and high precision version support an external temperature sensor (included) for users who require temperature monitoring.

Additionally, a manual hand controller will be available as an optional accessory in the near future. This item allows direct operation of the electronic focuser without the need to connect it to a computer or touch the focuser.

Currently, QFocuser supports both Windows (with ASCOM drivers) and Linux systems. In the ASCOM driver, QHY has integrated basic functions such as move, custom current position, limit switches, torque maintenance, and temperature display, etc. It can also be controlled through other third-party software.

QFocuser allows users to set the coordinates of any positions through software. It also features limit protection to prevent excessive rotation.

Firmware upgrades are supported.

Specifications

• Version: High Precision
• Body Size (mm): About 43 x 39 x 50 (excluding the focus knob)
• Weight: About 265g
• Motor: Non-reducing motor
• Backlash: Almost zero backlash
• Max. Loads: About 7.5kg (16.5 lbs)
• Manual Focus After Installing: Supported

• System Supported: Windows (ASCOM), Linux

• External Temperature Sensor: Supported
• Data Interface: USB2.0 Type-C
• Power Supply: 5v/12v

• Product Driver Operating Environment:

  • Computer System: Windows 7 and later versions

  • Software Version: ASCOM platform version 6.5 and above

  • Third-party Software Support: Supports N.I.N.A., MaxDL, and other third-party software that supports the ASCOM platform (not compatible with ZWO ASIAIR)