The ESATTO 3.5" LP robotic focuser (PrimaLuceLab, SKU: PLLEST35LP-B ) is an exceptionally low-profile, remote-controlled focuser designed for the most demanding astrophotographers. At just 32mm thick, it offers 90mm of free aperture, 10mm of working travel, and a payload capacity of up to 10kg . The mechanical resolution of 0.01µm/step and the Crayford ball bearing design guarantee backlash-free, repeatable focusing even with heavy full-frame cameras and correctors.
• 32mm ultra-low profile housing - ideal for astrographs with short back-focus
• 90mm free aperture - no vignetting for full-frame and medium-format sensors
• working travel range 10 mm with a resolution of 0.01 µm/step
• 10 kg axial load capacity - reliable support for heavy filter wheels and cameras
• USB-C port, built-in Wi-Fi (Virtual HandPad) and dedicated ARCO port for direct power supply and control of ARCO 3″/2″ rotators
• status LEDs with the option of dimming - work in the observatory without disturbing visual adaptation
• M6 threads of the PLUS system facilitate the assembly of clamps, plates and PrimaLuceLab accessories
• ESATTO 3.5" LP extractor
• USB-C → USB-A cable (1.5 m)
• 12 V DC / 5 A power supply (5.5 × 2.5 mm plug)
• a set of mounting screws and Allen keys
• user manual
• free aperture: 90 mm
• working travel: 10 mm
• resolution: 0.01 µm/step
• body thickness: 32 mm
• axial load capacity: 10 kg
• interfaces: USB-C, Wi-Fi 2.4 GHz, ARCO port, temperature probe socket
• power supply: 12 V DC / 0.5 A (5.5 × 2.5 mm plug, plus in the middle)
• weight: 1.45 kg
• operating temperature range: −25 °C … +40 °C
• manufacturer: PrimaLuceLab – Italy
With its combination of ultra-low profile, large aperture and sub-micron precision, the ESATTO 3.5" LP is the perfect choice for telescopes with limited back-focus and advanced astrophotography setups requiring reliable, automated focusing.
