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ESATTO 4" is the large dimensions robotic microfocuser that we designed for observatory class telescopes or for astrographs that need for large free aperture, like the Takahashi FSQ-106.

Compared to the smaller models, ESATTO 4" offers a larger free aperture of 102mm, a longer draw tube travel of 35mm and a higher payload capacity of 10 kg, always with the incredible technical features of all the ESATTO focusers: incredible resolution of 0.04 microns per step, USB-C port for computer control, WiFi connection with included Virtual HandPad and ARCO rotator port.

ESATTO 4” robotic microfocuser - main features:

• Crayford style focuser with 40 ball bearings, specially designed for very high load capacity (up to 10 kgs) with no flexure
• low profile design with only 65mm thickness (91mm with internal flange).
• 35mm focuser travel with an incredible resolution of 0.04 microns per step!
• remotely controlled from EAGLE or any Windows computer, with FOCUSER Manager control software (tested with Windows 10 computers) or ASCOM drivers.
• USB-C connector offering greater reliability and can be connected to any USB type port thanks to the included cable.
• Remote control with WiFi from any smartphone, tablet or computer and ESATTO Virtual HandPad app also for visual use!
• ARCO port to easily connect the ARCO rotator to the ESATTO without the need for additional data or power cables.
• Weight: 2050 grams