3″ ARCO rotator

ARCO 3" Field Rotator and Derotator from PrimaLuceLab

PrimaLuceLab's ARCO 3" is a motorized field rotator and derotator designed for demanding astrophotographers and observers looking for precision and flexibility in their set-ups. With exceptional resolution of 1 arcsecond per step, it integrates perfectly with ESATTO and SESTO SENSO 2 systems to offer advanced control of field framing and derotation.

Advanced technical features

• Exceptional precision: Angular resolution of 1 arcsecond per step, ideal for fine-tuning the framing of celestial objects or compensating for field rotation on alt-azimuth mounts.
• Compact profile : Thickness of just 23 mm, allowing discreet integration into complex configurations.
• Optimized free opening : Internal diameter of 76.3 mm, perfect for large-format, vignetting-free sensors.
• Heavy-duty payload : Designed to support heavy cameras and accessories without bending or mechanical play.

Mechanical interfaces

Input interface (telescope side) :

• Standard M81x1 female thread for direct connection to ESATTO 3" or ESATTO 4" eyepiece holders via dedicated adapters.
• Also compatible with SESTO SENSO 2 thanks to specific adapters available.

Output interface (accessory side) :

• Standard M81x1 male thread, compatible with a wide range of accessories such as :
• DSLR/mirrorless cameras
• CCD/CMOS cooled cameras
• Optical correctors or reducers
• Optional adapters available to meet specific requirements.

Connectivity and control

• Direct connection : Powered and controlled via an included short cable, eliminating the need for additional cables.
• Compatible software : Controllable via PLAY software on a Windows PC or via ASCOM for integration in automated systems.
• EAGLE system compatibility : Allows centralized control.

Advanced features

• Field derotation : In alt-azimuth mode, ARCO compensates for field rotation, enabling long exposures without the need for an equatorial mount.
• Precise rotation : Adjust the angle of your camera with incredible precision to achieve perfect framing.
• Compatible with large-format sensors : Thanks to its extended free opening.

Robust, premium design

• Material : Made from high-quality aluminum, for durability and lightness (total weight: 1060 g).
• Optimized design : Minimizes space requirements while maximizing mechanical stability.

In the Box

• ARCO 3" rotator
• A short cable for direct connection to ESATTO or SESTO SENSO 2
• Detailed user manual

Specific adapters (telescope or camera) are available separately, depending on the particular requirements of your configuration.

Distinctive features

• Micrometric resolution (1 arcsecond per step).
• Ultra-thin profile (23 mm) with 76.3 mm clear opening.
• Universal mechanical interfaces (M81x1 threads).
• Native integration with ESATTO and SESTO SENSO 2 via a single cable.
• Advanced derotation functionality for alt-azimuth frames.

Conclusion

The ARCO 3" is an indispensable tool for astrophotographers seeking precise framing control and maximum flexibility in their projects. Compact, rugged and incredibly precise, it fits perfectly into modern advanced astrophotography set-ups.