Canon Version
- E-TTL- / E-TTL-II flash mode
- E-TTL remote mode (slave mode)
Nikon / Fujifilm Version
- i-TTL / i-TTL BL
- i-TTL remote mode (slave mode)
Olympus / Panasonic / Leica Version
- Four Thirds TTL flash mode
- Four thirds TTL remote mode (slave mode)
Pentax Version
- P-TTL flash mode
- P-TTL remote mode (slave mode)
Sony Alpha Version
- ADI flash mode / pre-flash TTL
- ADI remote mode (slave mode)