About this product
Oasis Electronic Focuser with Clutch
This Electronic Focuser from Astroasis features a Clutch mechanism with high precision, large load capacity and minimal backlash. It also supports focusing via a Bluetooth interface.
Features
- Clutch Mechanism for easy and fast switching between motor and manual focusing
- Bluetooth function so mobile devices such as mobile phones can be used to control the focuser via Bluetooth
- Small compact size size
- High-precision stepper motor with micron-precision steps
- Ability to drive heavy loads. Tests indicate that it can drive net loads exceeding 5kg
- Small backlash
- Easy to install/uninstall. Only one screw necessary to install or uninstall the focuser body onto many popular telescope focusers
- Highly integrated design. Other than the ambient temperature probe, all functions and components (including the motor, controller board, etc.) are integrated into the focuser body
- Supports ASCOM
- Supports USB HID device interface. Driver-free for Windows operation system.
- Two temperature sensors. One monitors board temperature, and the other monitors ambient temperature.
- Supports backlash compensation
- Supports electronic auto-focusing
- A beep generator for alarms
Clutch
This product features the use of two gears. One of the gears is installed on the shaft of the telescope focuser, and the other is installed on the motor shaft. The two gears can be separated or meshed by holding the rear end of the Oasis Focuser and turning it.
The clutch is self-locking. In most cases, as long as the Oasis Focuser is switched to an ON or OFF state, it can be kept in a stable mesh or locking state.
Bluetooth control
Users can use mobile devices such as a Smart Phone or Tablet to connect to the Oasis Focuser via Bluetooth. Once connected, users can use the Smart Phone or Tablet device to undertake operations such as focusing, firmware upgrading, etc
Small body size with large driving ability
The Oasis focuser uses a small diameter and high reduction ratio stepper motor made by NPM motor company from Japan. Testing on a Sharpstar 107PH telescope indicates that this product can steadily drive a net load of more than 5 kg.
High precision
The higher reduction ratio means more steps and higher focusing resolution when focusing. Astroasis testing found that the SkyRover 102 APO Pro refractor takes approximately 125 steps per 0.1mm focusing distance. While on the Sharpstar 107PH Refractor, it takes about 159 steps per 0.1mm focusing distance. On both telescopes, the focusing distance of each step is less than 1 micron.
Minimal Backlash
The meshing and locking mechanism of the gears is designed carefully, and the two gears can mesh smoothly and perfectly to achieve the best meshing state. The backlash introduced by the gears is reduced effectively. The overall backlash of the product is minimal. The backlash of the product is only about 1/3 to 1/5 of competing products.
Convenient installation
The Oasis Focuser body can be installed onto the telescope focuser using a clamp. Installation and removal of the Oasis focuser body requires only a single screw and can be done very quickly and easily. The Oasis focuser can also be installed on a variety of telescope focusers. A small step is designed on the clamp for auxiliary installation and positioning (as shown in the picture below).
Highly integrated
Other functional components, including the motor and control board, are within the Oasis focuser body (the temperature sensor is external). This ensures the Astroasis focuser is easy to install and operate.
If you use Bluetooth to control the focuser, it is not necessary to use a USB cable to connect the focuser to a computer or other device. 12V power to the Oasis focuser is required.
The packing list of this product is as follows:
Customer reviews
| Average Rating (1 Review): | |
14 March 2024 | David
I've been using this for a few months now and it's made a world of difference to me and the ease at which I can slew around the sky imaging different targets, refocusing periodically (a ~20 year old C8 SCT using NINA's sequencer to run unattended). It's also great to be able to switch to manual focus just by twisting the focuser body (useful when running a planetary imaging or visual setup).
No real downsides, just be aware that when switching between manual and electronic focusing there is a small focus movement as the gears remesh and so you do need to tweak the focus in software. The only other thing to say is that - like most things in this hobby - it might take a few sessions tweaking settings (steps, backlash, etc) before you find the right setup to have NINA autofocus reliably.
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