The mitros ttl transceiver flash features a built in odin transmitter and receiver as well as full e ttl e ttl ii functionality for use with canon cameras the mitros has a guide number of 190 at iso 100 in the 105mm position useful for illuminating subjects within a zoom range of 24 to 105mm additionally the flash features wireless transmission via an optical pulse or ir triggering and can access 4 channels and 3 groups the flash head has the ability to rotate 180deg in each d