Vixen Polarie U Star Tracker 

The Vixen Polarie U Star Tracker is an ultra-compact, easily portable automatic star tracking device. In addition to the functions of conventional star trackers that move a camera for long exposure according to the diurnal motion of the celestial objects, it also features a function for customising rotation speeds using a smartphone and can control the intervals of shots by adjusting the shutter release. By linking the motion of the POLARIE U with the shutter release, complex shooting controls required for interval photography and time-lapse photography can be set up with a smartphone. 


  • Star-scape photography
  • Control via a smartphone
  • Five tracking modes
  • Autoguider port
  • Two way power supply - self contained with 4 AA batteries or USB Type-C external power supply port
  • Camera Mounting Block
  • Bubble Level and Direction Scale for Time-Lapse
  • Sight Tube as a Finder Scope
  • Tripod Screw Sockets
  • Quick Release Clamp (optional)
  • Portable


  • R.A. slow motion control: Wheel and worm gears full circle micro movement. 58.4mm in diameter, 144-tooth, made of aluminum alloy
  • Worm gear shaft: 9.8mm in diameter, made of brass
  • R.A. axis (Polar axis): 40mm in diameter, made of aluminum alloy
  • Number of bearings: 2 pieces:
  • Drive: Pulse motor drive
  • Loading capacity: 2.5 kg: Standard / 6.5 kg: Upgraded / 10 kg: Time-lapse
  • Tracking rates: Celestial speed, 0.5x celestial, solar, lunar, available in N and S hemispheres (Remote setting is possible with a smartphone.)
  • Sight tube finder: It is used in the northern hemisphere to guide the unit to Polaris. 8.9 degrees field of view with no magnification.
  • Polar scope: Optionally available Polar alignment scope PF-L II is usable. Polar scope arm bracket sold separately is needed.
  • Levelling: Bubble level is provided for time-lapse photography.
  • Tripod adapter block: 3/8" camera screw sockets (2 places) with a conversion adapter for 1/4" screw, compatible with attachment plates of the standard thin type.
  • Shutter release terminal: 2.5mm female jack for tripolar stereo mini plug, Pin assignment: On order of full shutter, half shutter and common, from center to outward
  • Autoguider Port: 6-pole 6-wired modular jack (for an external autoguider)
  • External Power Supply Port: USB Type-C
  • Power Source: 4 x AA alkaline batteries, Ni-MH or Ni-Cd rechargeable batteries, USB Type-C external power batteries
  • Working Voltage / Electricity Consumption: AA batteries: DC 4.8V to 6.0V, Max. 0.6A (at 2.5kg/5.5 lbs. loading weight)External power supply: DC 4.4V to 5.25V, Max. 0.3A (at 2.5kg/5.5 lbs. loading weight)
  • Working Duration: About 7 hours at 20 degrees C (68 F) temperature, with use of Alkaline batteries (at 2.5kg loading weight).
  • Wi-Fi: Application software for POLARIE U and a smartphone or communication terminal device that works on Wi-Fi are needed.
  • Operating Environment for Application Software: OS: Android 4.4 and over or iOS 9.9 and over* Wi-Fi: IEEE 802.11b/g, Data Encryption Method: WPA2-PSK, *Be sure to confirm the operation of the application, as some smartphones do not meet the requirements.
  • Operating Temperature: 0 degree to 40 degrees C 
  • Dimensions: 88.5mm x 72mm x 110.5mm
  • Weight: 575gm (without batteries)
  • Optional Accessories: Polar alignment scope PF-L II, Polar scope arm bracket, Polar fine adjustment unit DX, Polar meter

WARRANTY: 1 year

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