Here's the comparison of the two Orbbec Gemini 305-series cameras on the three points you asked about:
Gemini 305 vs Gemini 305g
| Attribute | Gemini 305 | Gemini 305g |
|---|---|---|
| Interface | USB 3.0 / USB 2.0 Type-C | GMSL2 + USB 3.0 / USB 2.0 Type-C |
| IP rating | IP54 | IP65 |
| Weight | 68 g | 116 g |
orbbec.com +5orbbec.com ↗“camera.interface=USB 3.0 / USB 2.0 Type-C”doc.orbbec.com ↗“camera.interface=GMSL2, USB 3.0 / USB 2.0 Type-C”orbbec.com ↗“mechanical.ip_rating=IP54”doc.orbbec.com ↗“mechanical.ip_rating=IP65”orbbec.com ↗“mechanical.weight_g=68 g”doc.orbbec.com ↗“mechanical.weight_g=116 g”
What this means for a mobile robot
- Interface: The Gemini 305 is USB-only (Type-C), which works well if your robot's compute module has a free USB 3.0 port. The Gemini 305g additionally supports GMSL2, which is ideal for longer cable runs or setups where you want to connect the camera through a serializer/deserializer link rather than USB.
- IP rating: The 305g (IP65) offers better protection against dust and water jets, which matters if your robot operates in harsh or outdoor environments. The 305 (IP54) is limited to dust-protected and splash-resistant.
- Weight: The 305 (68 g) is roughly 48 g lighter than the 305g (116 g) — a consideration for smaller mobile platforms or gimbals where payload matters.
Both cameras share the same core imaging specs: stereo depth at 1280×800 @ 30 fps and RGB at 1280×800 @ 60 fps, with the same operating temperature range of −10 °C to 45 °C (ambient, depending on the disparity search range).
orbbec.com +1orbbec.com ↗“depth1280x800 at30fps; RGB1280x800 at60fps”doc.orbbec.com ↗“depth1280x800 at30fps; RGB1280x800 at60fps”
Bottom line: If your mobile robot needs a GMSL connection or faces dusty/wet environments, the Gemini 305g is the better fit. If you're on USB and working in cleaner indoor settings, the lighter Gemini 305 will do the job.