ESATTO 3" focuser with ARCO 3" rotator (PrimaLuceLab, SKU: PLLEST3ARCO3 ) is a fully integrated focus and frame rotation package for advanced astrophotography setups. It combines the ESATTO 3" precision focuser with the ARCO 3" rotator via a dedicated adapter, creating a compact module with a total thickness of only ≈ 90 mm and a free aperture of 76.3 mm . A single 12 V power supply and a single USB-C connection enable full remote control of camera focus and rotation via PLAY software or ASCOM/INDI drivers.

The most important features of the set

• ESATTO 3" focuser - 25 mm travel range, 0.04 µm/step resolution, 8 kg payload, 76.3 mm free aperture, 67 mm thickness
• ARCO 3" rotator - continuous 360° rotation, resolution 1 arcsec/step, thickness 23 mm; powered and controlled directly from the hoist
• Compact design - focuser + rotator + adapter ≈ 90 mm back-focus
• Maximum load capacity - Crayford design (28 bearings) supports heavy filter wheels and full frame cameras
• One USB-C and Wi-Fi - full remote control (PLAY, ASCOM, INDI, Virtual HandPad) without additional control cables
• ARCO Port - rotator powered by ESATTO, no separate 12V cable
• LEDs with dimming function - night work without disturbing visual adaptation
• PLUS system - M6 threads in the body facilitate the assembly of clamps and PrimaLuceLab accessories

Set components

• ESATTO 3″ lift
• ARCO 3″ rotator
• ESATTO 3″ ↔ ARCO 3″ adapter
• USB-C → USB-A cable (1.5 m)
• ESATTO ↔ ARCO connecting cable
• 12V DC / 5A power supply ( 5.5 × 2.5mm )
• set of mounting screws and keys
• user manual

Technical parameters

• free aperture: 76.3 mm
• total thickness (focuser + rotator + adapter): ≈ 90 mm
• working stroke of the extractor: 25 mm
• focuser resolution: 0.04 µm/step (160,000 steps/mm)
• axial load capacity: 8 kg
• rotator resolution: 1 arcsec/step
• rotation range: 0–360° (continuous)
• interfaces: USB-C, Wi-Fi 2.4 GHz, ARCO port
• power supply: 12 V DC / 0.5 A (rotator powered by ESATTO)
• set weight: 1.9 kg
• operating temperature: −25 °C … +40 °C
• manufacturer: PrimaLuceLab – Italy

The ESATTO 3" + ARCO 3" kit delivers sub-micron focusing precision and accurate frame rotation in a single low-profile module, ideal for today's astrophoto telescopes requiring short back-focus and high optical bandwidth.