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Model: iOptron SkyGuider Pro with integrated iPolar polar alignment system
Upgrade Included: William Optics Alt-Azimuth base (CNC-machined aluminum, fine-thread latitude and azimuth adjusters, solid dual-plate design for high rigidity and precision)
Mount Type: Portable equatorial tracker with single-axis RA drive and optional DEC bracket
Payload Capacity: Up to 5 kg (11 lbs) balanced — supports DSLR/mirrorless rigs or small refractors
Drive System: Precision worm-gear drive powered by a micro-stepped stepper motor
Tracking Rates: Sidereal, lunar, solar, 0.5×, and 2× for timelapse applications
Tracking Accuracy: Periodic error typically ±6 arcsec; autoguider port provided for refinement
Polar Alignment: Built-in iPolar electronic polar scope (USB-connected, PC software alignment to <1′ accuracy)
Power Supply: Internal rechargeable Li-ion battery (up to 20 hrs operation), or 5 V USB external input
Interfaces & Controls:
- ST-4 autoguider port
- USB Mini-B port for iPolar
- Power switch with status LEDs and speed selector
Mounting Base: William Optics premium Alt-Az wedge replaces stock base — provides precise adjustment, solid clamping, and improved polar stability
Tripod Interface: 3/8″ threaded base; compatible with standard photo tripods or heavy-duty field tripods
Weight: ~1.45 kg (head only), ~2.3 kg with WO wedge
Build: All-metal construction, anodized aluminum housing and worm gear assembly
Condition: Excellent — smooth drive motion, iPolar fully functional, wedge mechanics tight and precise, minor cosmetic wear only
Use Case: Ideal for portable deep-sky imaging, Milky Way panoramas, or long-exposure tracking with DSLR, mirrorless, or small APO telescopes