¶ Top structure
- Gearbox belt tensioning screws (A / B)
- Belt tension adjustment screw
- Bubble level
- ¼-20 UNC ball-head mounting screw
- Laser / polar-scope mount
- Hinge shaft
- Latitude adjustment knob
- Azimuth adjustment knob
OG Star Tracker
¶ Travel light. Track steadily.
OG Star Tracker is our single-axis star tracker for portable astrophotography, combining quick setup, stable tracking, and travel-friendly operation. This page covers its structure, interfaces, recommended accessories, and current specifications. For installation and operation, continue to the documentation center.
5 kgMaximum payload
5 VUSB-C power
≈ 1.4 kgDevice weight
10″Periodic error over 10 min
¶ Product structure
Use the top and bottom diagrams to identify the adjustment mechanisms, ports, and mounting points.
¶ Bottom and interfaces
- 2.5 mm camera shutter port
- Tracking status indicator
- USB-C power input (5 V, at least 1 A)
- Removable phone holder
- Belt tension indicators (A / B)
- 3/8-inch tripod thread
- Magnetic storage point for the latitude adjustment lever
¶ Recommended setup
A ball head is required to mount and frame a camera. Use the dedicated guide to select a configuration for your focal length and payload.
¶ Ball head
The ball head attaches to the top of the tracker and connects the camera for framing. Select a model with suitable capacity for the installed equipment.
¶ Payload and configuration reference
Usable capacity also depends on counterbalancing, center of gravity, tripod rigidity, and imaging focal length.
¶ Specifications
These values follow the Wiki’s current specification set. When information conflicts or changes, refer to the specification-sources page.
| Maximum payload | 5 kg |
| Reduction ratio | 101.25 |
| Dimensions | ≈ 175 × 130 × 115 mm |
| Latitude adjustment | 0°–25° and 25°–90°; locations south of 25° N may require an alternative accessory |
| Azimuth adjustment | 50° |
| Periodic error | Approximately 10 arcseconds over 10 minutes |
| Wi-Fi control | Supported |
| Bluetooth shutter control | In development |
| Recommended operating temperature | -15°–40° |
| Tripod compatibility | 3/8-20 thread; a 3/8-to-¼ adapter can be used |
| Ball-head compatibility | ¼-20 UNC screw; a ¼-20-to-3/8 adapter can be used |
| Wired shutter control | Supported through a 2.5 mm port |
| Power | USB-C, 5 V, at least 1 A |
| Body materials | Glass-fiber-reinforced ABS composite for primary load-bearing parts; ABS for remaining structures |
| Weight | ≈ 1.4 kg, depending on configuration |
| Main drive | High-precision DC stepper motor with a 0.9° step angle |
| Transmission | High-precision timing belt |