Profoto B1X 500 AirTTL 1-Light To-Go Kit - Manual (Page 20)

B1X
20
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TTL
Profoto B1X supports TTL when used with any of the optional Air
Remote TTL. With a TTL remote mounted in the camera hotshoe, you
may select to let the camera control the flash output fully automatically
without manual metering. Note that TTL is selected/activated on the
remote, not on the flash.
If the camera requires a flash output outside the range of the B1X, the
B1X will blink the energy setting on the LCD Display [13] and produce a
long beep to indicate this (it will only beep if the ready signal is turned
on).
The automatic flash exposure indicator [26] ‘AUTO’ is lit every time the
flash output is set automatically by the camera. The indicator is lit for
10-15 seconds after receiving a TTL flash command from the remote.
Important:
Profoto is continuously releasing firmware upgrades to improve and expand TTL compatibility with more camera
brands and the latest camera models. Register your profoto products on profoto.com/myprofoto to get access
to the latest upgrades and to get noticed when new upgrades are available. Find more info on the optional TTL
remotes and a list of compatible cameras on Profoto.com.
HSS
Profoto B1X supports HSS (High-Speed Sync) if used with any of the
optional Air Remote TTL tranceivers. HSS enables shooting with flash
at a faster shutter speed than the fastest external flash sync speed
(x-sync) of the camera. This option can be extremely useful to limit the
influence of ambient light when shooting in bright conditions.