- Versatile I-TTL (intelligent TTL) Speedlight
- Multi-step power-zoom: covers a wide 24-120mm angle of view.
- Guide number: 25(EVEN)/28 (STD)/30 (CW)
- High-speed recycling time: approx. 2.5 seconds when using NiMH
- A:B mode for quick wireless control: allows control of the light ratios of A and B group Speedlight units.
- Firmware can be upgraded via the storage media in the attached camera.
- Automatic thermal protection system
- Automatic filter detection