Re X1T-C v. 11
I've found one error in the manual, and one bug in the firmware:
The error is:
Page 33 of the manual (Godox_X1C_20160219.PDF)
section "Setting the Transmitter"
dot point "Group Settings"
The third sentence reads:
"If the current group is in the TTL mode, all the other groups which are in the M mode will change their FEC amount simultaneously"
I believe this should read instead:
"If the current group is in the TTL mode, all the other groups which are also in the TTL mode will change their FEC amount simultaneously"
One of the cooler features of the X1T-C is its ability, when in <Gr> mode, to adjust the power levels of all groups simultaneously. This feature works, but not *quite* as it is supposed to as per the manual.
After entering the global power-adjustment mode by long-pressing the Gr button, the manual says:
If the current group is in the M mode, all the other groups which are in the M mode will change their power output value simultaneously. The power output value is changeable from 1/1 full power to Min. power in 0.3 stop increments, until one of the group’s setting turns to the maximum(1/1) or the minimum(Min.)
This behavior works correctly when turning power levels UP, but not when turning them DOWN.
For example, if
Group A is at 1/2
Group B is at 1/8
and you begin increasing the global power level, after three upward clicks of the wheel, Group A will be at full power and Group B will be at 1/4. Any more upward adjustment will do nothing to the setting of either group. The X1T-C will stay at 1/1 on group A and 1/4 on group B, maintaining the ratio, just as the manual says it does.
However, things are different when turning global power levels down.
Group A is at 1/64
Group B is at 1/32
and you begin decreasing global power levels, after three downward clicks Group A will reach the minimum 1/128 level. HOWEVER, subsequent downward clicks will continue turning down other Groups' power levels until they all show 1/128. At that point, any ratios the user had set up via power levels will be lost, since all groups will be at 1/128.
I've just noticed that this anomaly goes away if you set the X1T-C custom function 5 to "1". This CF enables a lower minimum power setting of 1/256 (shown on the LCD as "128-") although I think this only works on the AD600 flashes. So, it's not a fix really (unless you're ONLY using AD600s) but it is a workaround of sorts.