OrionU's dual-screw steel-shaft star tracker: a 500 g carbon-fiber PETG body carrying 4 kg axially and 2 kg laterally without counterweights, with a high-brightness polar pointer, ESP32 control on 5 V power and a 3/8-inch tripod fitting.
OrionU’s tracker weighs 500 g (17.6 oz) and measures 7.3 × 5 × 7.2 cm. It carries 4 kg on its axis and 2 kg off to the side, without counterweights. The lateral figure is the one that matters for a camera on a ball head.
The build
A thickened steel main axis with a dual-screw internal lock, in a carbon-fiber-reinforced PETG body, hand-assembled and tested. A 3/8-inch tripod interface fits most photo tripods.
Control and power
An ESP32 dual-core controller on 5 V, from a power bank.
Polar alignment in the cold
A high-brightness star pointer, rated stable down to −10 °C (14 °F). It is a laser: point it only at the sky.
What is not published
Tracking rates and tracking accuracy. The OGST tracker from the same seller family publishes a periodic error; see OGST single-axis tracker.
Price and availability
On November 7, 2026, Amazon.com listed it at about $122 from a third-party seller.
Figures as Keepa reported them on the day this page was last updated. Stock and pricing shift without warning.
Prices quoted in this text were read on November 7, 2026. The live price is at the top of the page.
Its two nearest scopes on price
Same aisle, closest price — what the same spend else shows.
Star pointer is a laser: never aim it at people or aircraft
Specifications
Payload
4 kg (8.8 lb) axial and 2 kg (4.4 lb) lateral, without counterweights, stated
Counterweight
Not needed for the stated loads
Tracking rates
Not published by the maker.
Polar alignment method
High-brightness star pointer, stable down to −10 °C (14 °F), stated
Power source
5 V, from a mobile power bank · ESP32 dual-core controller
Weight
500 g (17.6 oz) · 7.3 × 5 × 7.2 cm
Head fitting
3/8 in tripod interface · thickened steel main axis with dual-screw locking · carbon-fiber-reinforced PETG body
Amazon reference
B0G43PC9NN
EAN
6213960096073
What observers ask about this one
What does a lateral load figure mean?
How much it carries when the camera sits off to the side of the axis, as it does on most trackers. 2 kg is enough for a mirrorless camera and a short telephoto.
How is it polar-aligned?
With a bright star pointer aimed at Polaris. OrionU says it works down to −10 °C. Point it only at the sky, never at people or aircraft.
What powers it?
Any 5 V USB power bank.
The price on Amazon.com
This model is listed on Amazon.com, at ≈ $122 at the last reading. Listed is not the same as in stock: availability changes daily, and the buy box shows the live price.
Details checked on November 7, 2026.
This one and its buyer, among astronomy instruments
A camera and short lens carried a long way, where every gram and every counterweight counts
Specifications: the manufacturer sheet for telescopes and observing optics and the matching Amazon product page. Prices and availability: Keepa. Every figure on this page names its source.
±10 arcsec periodic error over 10 min · 1:101.25 gear train · 1.4 kg carrying 4 kg (8.8 lb) · Wi-Fi, open source · three polar alignment methods
OGST's single-axis tracker: a 1.4 kg mount carrying 4 kg, with a stepper motor and 1:101.25 gear train for ±10 arcseconds of periodic error over 10 minutes, open-source Wi-Fi control and polar scope, phone and star-pointer alignment.
Best for: A camera and a 300 mm lens under a dark sky, for someone who wants the tracking error on paper
Motorized tracker · Wi-Fi with the SAM Console app · deluxe equatorial base · fits photo tripods · wide-field, time-lapse and telescopic use
Sky-Watcher's Star Adventurer 2i Pro Pack: a motorized portable tracking platform with Wi-Fi control from the free SAM Console app and a deluxe equatorial base, for Milky Way, eclipse, time-lapse and small-telescope use on a photo tripod.
Best for: Camera-based night sky photography on an existing photo tripod
Sidereal, lunar, solar and time-lapse speeds · 20 hours on 4 AA · 22.4 oz in the bullets, 23 oz in the title · LCD menu
SLIK's ECH-630: a compact motorized star tracker with sidereal, lunar, solar and time-lapse speeds, an LCD menu and up to 20 hours on four AA batteries, about the size of a 24-70 mm lens, with an optional SMH-250 polar head.
Best for: Backcountry night photography where batteries must be replaceable and the speed switchable
