PrimaLuceLab SESTO SENSO 3 SC Robotic Focusing Motor for SC Telescopes
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- All-in-one chassis designed for attachment on most SCT focusers
- Encoder for position tracking and manual movement w/ Automatic Position Recovery
- Direct Pulley Clamp (DPC) with backlash-free, pulley-driven coupling
- 2 million steps for precise control of internal mirror focusers
- USB-C connectivity to control from computers with astronomy software
- WiFi connectivity to control it from smartphone or tablet
- Compatible with PLAY software to control focus position
- Provided with ASCOM drivers to let you control through third party astronomy software
- Directly connect the ARCO without the need for additional data or power cables
- Dark mode with dimmable LED lights
- Ghost mode to remove USB cable when used with EAGLE computer
- Temperature sensor port to compensate for environmental temp. changes
PrimaLuceLab SESTO SENSO Robotic Focusing Motor for SCT OTAs
The PrimaLuceLab SESTO SENSO 3 SC brings precise, automated focusing to Schmidt-Cassegrain and other compatible telescopes with internal focusing mechanisms. Designed and manufactured in Italy, this advanced robotic focuser combines smooth, backlash-free operation with an ultra-high-resolution motor for accurate focusing during astrophotography and visual observation.
Featuring an innovative Direct Pulley Clamp (DPC), built-in position encoder, and Automatic Position Recovery, the SESTO SENSO 3 SC makes focusing easier and more reliable than ever. Built-in WiFi and USB-C connectivity allow convenient control from a computer, smartphone, or tablet. Designed for compatible 8"–14" SCT, EdgeHD, and RASA telescopes, as well as the Sky-Watcher MAK180. Please Note: This focuser is not compatible with the Celestron C6 (6" SCT) or 9.25" EdgeHD due to its physical size, which prevents proper installation.
Check out these videos below of the SESTO SENSO 3 in action!
Lightweight, All-in-One Design
The SESTO SENSO 3 SC features a compact, lightweight design with integrated control electronics, conveniently located side ports, and dimmable status LEDs that can be turned off to eliminate stray light during imaging.
Connectivity options include:
- USB-C: Connects to an EAGLE or Windows computer using the included USB cable.
- ARCO Port: Powers and controls an optional ARCO camera rotator through a single cable.
- 12V Power Port: Powers the motor and electronics via a 5.5/2.5 mm center-positive connection using the included cigarette lighter cable or an optional EAGLE cable.
- Temperature Sensor Port: Supports an optional probe for automatic temperature-based focus compensation with compatible third-party software.
Easy Installation with Direct Pulley Clamp (DPC)
Featuring an innovative Direct Pulley Clamp (DPC) system that eliminates mechanical backlash for smooth, precise focusing. The included adapters accommodate a variety of telescopes, making installation quick and easy while maintaining the ability to focus manually.
Two adapter configurations support different telescope sizes:
- Top Adapter: Fits Celestron 8"–9.25" Schmidt-Cassegrain, 8" EdgeHD, 8" RASA, and Sky-Watcher MAK180 telescopes.
- Bottom Adapter: Fits Celestron 11" and 14" Schmidt-Cassegrain, EdgeHD, and RASA telescopes.
Please Note: The SESTO SENSO 3 SC is not compatible with the Celestron C6 (6" SCT) because the focuser's physical size prevents proper installation. It is also not compatible with the 9.25" EdgeHD.
Integrated Encoder
The included high-precision position encoder continuously tracks motor shaft rotation, even during manual adjustments using the Direct Pulley Clamp's knob. This ensures accurate position tracking when switching between visual and imaging setups on SCT, EdgeHD, and RASA telescopes.
Exclusive to the SC model, Automatic Calibration detects the focuser's minimum and maximum travel limits, allowing remote calibration without manual intervention—ideal for remote observatories. Automatic Position Recovery can also restore the previous focus position after accidental or manual movement, with an adjustable delay of 0–20 seconds. This is especially useful in public and educational observatories. Please Note: The encoder tracks motor shaft rotation only and cannot detect focus shifts caused by mirror flop or internal mechanical play.
USB-C for Fast and Reliable Connection
The USB-C port provides a reliable connection to Windows 10/11 PCs or EAGLE computers. Its reversible design makes connecting cables easier in the dark, while the secure interface helps prevent accidental disconnections. Compatible with standard USB-C cables, it eliminates the need for proprietary connectors and simplifies integration into portable or permanent astrophotography setups.
PLAY Astrophotography Software
The SESTO SENSO 3 SC is fully compatible with PrimaLuceLab's PLAY astrophotography software, allowing precise remote focusing from an EAGLE computer or Windows 10/11 PC. Its user-friendly interface includes AutoFocus for automatically optimizing star sharpness, along with temperature compensation, customizable focus presets, and real-time monitoring to maintain accurate, consistent focus throughout your imaging sessions.
ASCOM Drivers and Popular Softwares
Broad ASCOM compatibility allows seamless integration with popular third-party astronomy software, including NINA, Sequence Generator Pro, and MaxIm DL. Enjoy precise, reliable focusing control with the flexibility to use your preferred imaging software, whether at home or in a professional observatory.
WiFi and Virtual HandPad
With integrated WiFi functionality, SESTO SENSO 3 SC lets you operate your focuser wirelessly—no need for a computer or physical hand controller. The device generates its own WiFi network, so you can connect directly using a smartphone or tablet and access the Virtual HandPad through your browser. This intuitive interface allows you to move the focuser with ease and even store custom focus positions for quick recall, making it ideal for both imaging and visual observation. Virtual HandPad control stays active even when the unit is connected to a computer, giving you flexible dual-control options from multiple devices.
Direct Integration with ARCO Rotator
Seamless ARCO integration allows direct connection to PrimaLuceLab's high-resolution camera rotator and field de-rotator for precise remote framing and automatic field de-rotation on alt-azimuth mounts, eliminating the need for an equatorial wedge during long exposures. A single cable handles both power and data, simplifying your imaging setup for a compact, fully automated astrophotography system.
DARK Mode with Adjustable LED brightness
Adjustable LED indicators provide clear device status updates, with brightness controls and a DARK mode that completely disables illumination through PLAY software or the ASCOM driver. This helps preserve night vision and prevent stray light during imaging. When paired with an EAGLE computer, DARK mode activates automatically when a PLAY imaging sequence begins, ensuring a fully automated, light-controlled session.
GHOST Mode Connectivity and Easy Updates
GHOST mode enables cable-free focuser control when paired with an EAGLE computer, eliminating the need for a USB connection. It also provides backup communication if the USB connection is lost, ensuring uninterrupted operation. Additionally, seamless integration with PLAY software makes firmware updates easy, keeping your focuser current with the latest features, performance improvements, and compatibility enhancements.
Temperature Sensor Port
Automatic temperature compensation helps maintain precise focus as nighttime temperatures change. Connect the optional temperature sensor and calibrate it through PLAY software to establish the relationship between temperature and focus position. Once calibrated, PLAY or compatible third-party ASCOM applications can automatically adjust focus, making this feature especially useful for fast optical systems (faster than f/3) or imaging sessions with significant temperature fluctuations.
Dimensions and Weight
SESTO SENSO 3 SC maintains a compact and lightweight form factor that mounts directly onto your telescope. Weighing only 440 gr. (1.0 lbs), it adds minimal load to your setup while delivering high performance. Refer to the image for detailed dimensions and see how easily SESTO SENSO 3 SC integrates with your telescope.
Specifications:
- Compatible: SCT Telescope Focusers (except C6 and 9.25" EdgeHD)
-
Motor resolution: 2 million steps for precise control
-
Weight: 440 g (1.0 lb)
-
Connectivity: USB‑C port for computer control, built‑in WiFi for smartphone/tablet control
-
Ports include: 12 V power input, temperature sensor port, ARCO rotator port
-
Operating modes/features: DARK mode (dimmable/turn‑off LEDs), GHOST mode when paired with EAGLE computer
Other Information
- Country of Manufacture: Italy
PrimaLuceLab SESTO SENSO Robotic Focusing Motor for SCT OTAs
The PrimaLuceLab SESTO SENSO 3 SC brings precise, automated focusing to Schmidt-Cassegrain and other compatible telescopes with internal focusing mechanisms. Designed and manufactured in Italy, this advanced robotic focuser combines smooth, backlash-free operation with an ultra-high-resolution motor for accurate focusing during astrophotography and visual observation.
Featuring an innovative Direct Pulley Clamp (DPC), built-in position encoder, and Automatic Position Recovery, the SESTO SENSO 3 SC makes focusing easier and more reliable than ever. Built-in WiFi and USB-C connectivity allow convenient control from a computer, smartphone, or tablet. Designed for compatible 8"–14" SCT, EdgeHD, and RASA telescopes, as well as the Sky-Watcher MAK180. Please Note: This focuser is not compatible with the Celestron C6 (6" SCT) or 9.25" EdgeHD due to its physical size, which prevents proper installation.
Check out these videos below of the SESTO SENSO 3 in action!
Lightweight, All-in-One Design
The SESTO SENSO 3 SC features a compact, lightweight design with integrated control electronics, conveniently located side ports, and dimmable status LEDs that can be turned off to eliminate stray light during imaging.
Connectivity options include:
- USB-C: Connects to an EAGLE or Windows computer using the included USB cable.
- ARCO Port: Powers and controls an optional ARCO camera rotator through a single cable.
- 12V Power Port: Powers the motor and electronics via a 5.5/2.5 mm center-positive connection using the included cigarette lighter cable or an optional EAGLE cable.
- Temperature Sensor Port: Supports an optional probe for automatic temperature-based focus compensation with compatible third-party software.
Easy Installation with Direct Pulley Clamp (DPC)
Featuring an innovative Direct Pulley Clamp (DPC) system that eliminates mechanical backlash for smooth, precise focusing. The included adapters accommodate a variety of telescopes, making installation quick and easy while maintaining the ability to focus manually.
Two adapter configurations support different telescope sizes:
- Top Adapter: Fits Celestron 8"–9.25" Schmidt-Cassegrain, 8" EdgeHD, 8" RASA, and Sky-Watcher MAK180 telescopes.
- Bottom Adapter: Fits Celestron 11" and 14" Schmidt-Cassegrain, EdgeHD, and RASA telescopes.
Please Note: The SESTO SENSO 3 SC is not compatible with the Celestron C6 (6" SCT) because the focuser's physical size prevents proper installation. It is also not compatible with the 9.25" EdgeHD.
Integrated Encoder
The included high-precision position encoder continuously tracks motor shaft rotation, even during manual adjustments using the Direct Pulley Clamp's knob. This ensures accurate position tracking when switching between visual and imaging setups on SCT, EdgeHD, and RASA telescopes.
Exclusive to the SC model, Automatic Calibration detects the focuser's minimum and maximum travel limits, allowing remote calibration without manual intervention—ideal for remote observatories. Automatic Position Recovery can also restore the previous focus position after accidental or manual movement, with an adjustable delay of 0–20 seconds. This is especially useful in public and educational observatories. Please Note: The encoder tracks motor shaft rotation only and cannot detect focus shifts caused by mirror flop or internal mechanical play.
USB-C for Fast and Reliable Connection
The USB-C port provides a reliable connection to Windows 10/11 PCs or EAGLE computers. Its reversible design makes connecting cables easier in the dark, while the secure interface helps prevent accidental disconnections. Compatible with standard USB-C cables, it eliminates the need for proprietary connectors and simplifies integration into portable or permanent astrophotography setups.
PLAY Astrophotography Software
The SESTO SENSO 3 SC is fully compatible with PrimaLuceLab's PLAY astrophotography software, allowing precise remote focusing from an EAGLE computer or Windows 10/11 PC. Its user-friendly interface includes AutoFocus for automatically optimizing star sharpness, along with temperature compensation, customizable focus presets, and real-time monitoring to maintain accurate, consistent focus throughout your imaging sessions.
ASCOM Drivers and Popular Softwares
Broad ASCOM compatibility allows seamless integration with popular third-party astronomy software, including NINA, Sequence Generator Pro, and MaxIm DL. Enjoy precise, reliable focusing control with the flexibility to use your preferred imaging software, whether at home or in a professional observatory.
WiFi and Virtual HandPad
With integrated WiFi functionality, SESTO SENSO 3 SC lets you operate your focuser wirelessly—no need for a computer or physical hand controller. The device generates its own WiFi network, so you can connect directly using a smartphone or tablet and access the Virtual HandPad through your browser. This intuitive interface allows you to move the focuser with ease and even store custom focus positions for quick recall, making it ideal for both imaging and visual observation. Virtual HandPad control stays active even when the unit is connected to a computer, giving you flexible dual-control options from multiple devices.
Direct Integration with ARCO Rotator
Seamless ARCO integration allows direct connection to PrimaLuceLab's high-resolution camera rotator and field de-rotator for precise remote framing and automatic field de-rotation on alt-azimuth mounts, eliminating the need for an equatorial wedge during long exposures. A single cable handles both power and data, simplifying your imaging setup for a compact, fully automated astrophotography system.
DARK Mode with Adjustable LED brightness
Adjustable LED indicators provide clear device status updates, with brightness controls and a DARK mode that completely disables illumination through PLAY software or the ASCOM driver. This helps preserve night vision and prevent stray light during imaging. When paired with an EAGLE computer, DARK mode activates automatically when a PLAY imaging sequence begins, ensuring a fully automated, light-controlled session.
GHOST Mode Connectivity and Easy Updates
GHOST mode enables cable-free focuser control when paired with an EAGLE computer, eliminating the need for a USB connection. It also provides backup communication if the USB connection is lost, ensuring uninterrupted operation. Additionally, seamless integration with PLAY software makes firmware updates easy, keeping your focuser current with the latest features, performance improvements, and compatibility enhancements.
Temperature Sensor Port
Automatic temperature compensation helps maintain precise focus as nighttime temperatures change. Connect the optional temperature sensor and calibrate it through PLAY software to establish the relationship between temperature and focus position. Once calibrated, PLAY or compatible third-party ASCOM applications can automatically adjust focus, making this feature especially useful for fast optical systems (faster than f/3) or imaging sessions with significant temperature fluctuations.
Dimensions and Weight
SESTO SENSO 3 SC maintains a compact and lightweight form factor that mounts directly onto your telescope. Weighing only 440 gr. (1.0 lbs), it adds minimal load to your setup while delivering high performance. Refer to the image for detailed dimensions and see how easily SESTO SENSO 3 SC integrates with your telescope.
Specifications:
- Compatible: SCT Telescope Focusers (except C6 and 9.25" EdgeHD)
-
Motor resolution: 2 million steps for precise control
-
Weight: 440 g (1.0 lb)
-
Connectivity: USB‑C port for computer control, built‑in WiFi for smartphone/tablet control
-
Ports include: 12 V power input, temperature sensor port, ARCO rotator port
-
Operating modes/features: DARK mode (dimmable/turn‑off LEDs), GHOST mode when paired with EAGLE computer
- SESTO SENSO 3 SC
- Adapters
- USB-C to standard USB-A cable
- 12v DC cigarette-style plug power cable
- Hex keys for assembly
- Quick installation guide
- All-in-one chassis designed for attachment on most SCT focusers
- Encoder for position tracking and manual movement w/ Automatic Position Recovery
- Direct Pulley Clamp (DPC) with backlash-free, pulley-driven coupling
- 2 million steps for precise control of internal mirror focusers
- USB-C connectivity to control from computers with astronomy software
- WiFi connectivity to control it from smartphone or tablet
- Compatible with PLAY software to control focus position
- Provided with ASCOM drivers to let you control through third party astronomy software
- Directly connect the ARCO without the need for additional data or power cables
- Dark mode with dimmable LED lights
- Ghost mode to remove USB cable when used with EAGLE computer
- Temperature sensor port to compensate for environmental temp. changes
PrimaLuceLab SESTO SENSO Robotic Focusing Motor for SCT OTAs
The PrimaLuceLab SESTO SENSO 3 SC brings precise, automated focusing to Schmidt-Cassegrain and other compatible telescopes with internal focusing mechanisms. Designed and manufactured in Italy, this advanced robotic focuser combines smooth, backlash-free operation with an ultra-high-resolution motor for accurate focusing during astrophotography and visual observation.
Featuring an innovative Direct Pulley Clamp (DPC), built-in position encoder, and Automatic Position Recovery, the SESTO SENSO 3 SC makes focusing easier and more reliable than ever. Built-in WiFi and USB-C connectivity allow convenient control from a computer, smartphone, or tablet. Designed for compatible 8"–14" SCT, EdgeHD, and RASA telescopes, as well as the Sky-Watcher MAK180. Please Note: This focuser is not compatible with the Celestron C6 (6" SCT) or 9.25" EdgeHD due to its physical size, which prevents proper installation.
Check out these videos below of the SESTO SENSO 3 in action!
Lightweight, All-in-One Design
The SESTO SENSO 3 SC features a compact, lightweight design with integrated control electronics, conveniently located side ports, and dimmable status LEDs that can be turned off to eliminate stray light during imaging.
Connectivity options include:
- USB-C: Connects to an EAGLE or Windows computer using the included USB cable.
- ARCO Port: Powers and controls an optional ARCO camera rotator through a single cable.
- 12V Power Port: Powers the motor and electronics via a 5.5/2.5 mm center-positive connection using the included cigarette lighter cable or an optional EAGLE cable.
- Temperature Sensor Port: Supports an optional probe for automatic temperature-based focus compensation with compatible third-party software.
Easy Installation with Direct Pulley Clamp (DPC)
Featuring an innovative Direct Pulley Clamp (DPC) system that eliminates mechanical backlash for smooth, precise focusing. The included adapters accommodate a variety of telescopes, making installation quick and easy while maintaining the ability to focus manually.
Two adapter configurations support different telescope sizes:
- Top Adapter: Fits Celestron 8"–9.25" Schmidt-Cassegrain, 8" EdgeHD, 8" RASA, and Sky-Watcher MAK180 telescopes.
- Bottom Adapter: Fits Celestron 11" and 14" Schmidt-Cassegrain, EdgeHD, and RASA telescopes.
Please Note: The SESTO SENSO 3 SC is not compatible with the Celestron C6 (6" SCT) because the focuser's physical size prevents proper installation. It is also not compatible with the 9.25" EdgeHD.
Integrated Encoder
The included high-precision position encoder continuously tracks motor shaft rotation, even during manual adjustments using the Direct Pulley Clamp's knob. This ensures accurate position tracking when switching between visual and imaging setups on SCT, EdgeHD, and RASA telescopes.
Exclusive to the SC model, Automatic Calibration detects the focuser's minimum and maximum travel limits, allowing remote calibration without manual intervention—ideal for remote observatories. Automatic Position Recovery can also restore the previous focus position after accidental or manual movement, with an adjustable delay of 0–20 seconds. This is especially useful in public and educational observatories. Please Note: The encoder tracks motor shaft rotation only and cannot detect focus shifts caused by mirror flop or internal mechanical play.
USB-C for Fast and Reliable Connection
The USB-C port provides a reliable connection to Windows 10/11 PCs or EAGLE computers. Its reversible design makes connecting cables easier in the dark, while the secure interface helps prevent accidental disconnections. Compatible with standard USB-C cables, it eliminates the need for proprietary connectors and simplifies integration into portable or permanent astrophotography setups.
PLAY Astrophotography Software
The SESTO SENSO 3 SC is fully compatible with PrimaLuceLab's PLAY astrophotography software, allowing precise remote focusing from an EAGLE computer or Windows 10/11 PC. Its user-friendly interface includes AutoFocus for automatically optimizing star sharpness, along with temperature compensation, customizable focus presets, and real-time monitoring to maintain accurate, consistent focus throughout your imaging sessions.
ASCOM Drivers and Popular Softwares
Broad ASCOM compatibility allows seamless integration with popular third-party astronomy software, including NINA, Sequence Generator Pro, and MaxIm DL. Enjoy precise, reliable focusing control with the flexibility to use your preferred imaging software, whether at home or in a professional observatory.
WiFi and Virtual HandPad
With integrated WiFi functionality, SESTO SENSO 3 SC lets you operate your focuser wirelessly—no need for a computer or physical hand controller. The device generates its own WiFi network, so you can connect directly using a smartphone or tablet and access the Virtual HandPad through your browser. This intuitive interface allows you to move the focuser with ease and even store custom focus positions for quick recall, making it ideal for both imaging and visual observation. Virtual HandPad control stays active even when the unit is connected to a computer, giving you flexible dual-control options from multiple devices.
Direct Integration with ARCO Rotator
Seamless ARCO integration allows direct connection to PrimaLuceLab's high-resolution camera rotator and field de-rotator for precise remote framing and automatic field de-rotation on alt-azimuth mounts, eliminating the need for an equatorial wedge during long exposures. A single cable handles both power and data, simplifying your imaging setup for a compact, fully automated astrophotography system.
DARK Mode with Adjustable LED brightness
Adjustable LED indicators provide clear device status updates, with brightness controls and a DARK mode that completely disables illumination through PLAY software or the ASCOM driver. This helps preserve night vision and prevent stray light during imaging. When paired with an EAGLE computer, DARK mode activates automatically when a PLAY imaging sequence begins, ensuring a fully automated, light-controlled session.
GHOST Mode Connectivity and Easy Updates
GHOST mode enables cable-free focuser control when paired with an EAGLE computer, eliminating the need for a USB connection. It also provides backup communication if the USB connection is lost, ensuring uninterrupted operation. Additionally, seamless integration with PLAY software makes firmware updates easy, keeping your focuser current with the latest features, performance improvements, and compatibility enhancements.
Temperature Sensor Port
Automatic temperature compensation helps maintain precise focus as nighttime temperatures change. Connect the optional temperature sensor and calibrate it through PLAY software to establish the relationship between temperature and focus position. Once calibrated, PLAY or compatible third-party ASCOM applications can automatically adjust focus, making this feature especially useful for fast optical systems (faster than f/3) or imaging sessions with significant temperature fluctuations.
Dimensions and Weight
SESTO SENSO 3 SC maintains a compact and lightweight form factor that mounts directly onto your telescope. Weighing only 440 gr. (1.0 lbs), it adds minimal load to your setup while delivering high performance. Refer to the image for detailed dimensions and see how easily SESTO SENSO 3 SC integrates with your telescope.
Specifications:
- Compatible: SCT Telescope Focusers (except C6 and 9.25" EdgeHD)
-
Motor resolution: 2 million steps for precise control
-
Weight: 440 g (1.0 lb)
-
Connectivity: USB‑C port for computer control, built‑in WiFi for smartphone/tablet control
-
Ports include: 12 V power input, temperature sensor port, ARCO rotator port
-
Operating modes/features: DARK mode (dimmable/turn‑off LEDs), GHOST mode when paired with EAGLE computer
Other Information
- Country of Manufacture: Italy
- SESTO SENSO 3 SC
- Adapters
- USB-C to standard USB-A cable
- 12v DC cigarette-style plug power cable
- Hex keys for assembly
- Quick installation guide
PrimaLuceLab SESTO SENSO 3 SC Robotic Focusing Motor for SC Telescopes