High-speed sync – Godox QT400IIM Flash Head User Manual
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Stable Color Temperature Mode and High-Speed Flash (speed) Mode
Stable Color Temperature Mode or High-Speed Flash (speed) Mode can be chosen in the C.Fn-F1 setting. These
two modes are effective in M/Multi mode and ineffective in high-speed sync mode.
Stable Color Temperature Mode
: color temperature ranges within ±200K, which is a good choice for the
photographers who pursues stable color temperature.
High-Speed Flash (speed) Mode
: the max flash duration is up to t0.1=1/28984, which is perfect for capturing the
fast-changing actions. As the color temperature is a little higher in this mode, please set the camera’s white balance
parameter to the proportional color temperature amount (see the chart below) or AWB (Auto White Balance).
1/128
5729
1/ 4246
1/128
9335
1/ 28984
1/128+0.3
5718
1/ 4166
1/128+0.3
9108
1/ 26666
1/128+0.7
5686
1/ 3920
1/128+0.7
9010
1/ 24690
1/64
5619
1/ 3920
1/64
8535
1/ 22988
1/64+0.3
5635
1/ 3920
1/64+0.3
8205
1/ 20832
1/64+0.7
5657
1/ 3920
1/64+0.7
7698
1/ 18518
1/32
5630
1/ 3920
1/32
7367
1/ 16666
1/32+0.3
5639
1/ 3920
1/32+0.3
7151
1/ 15150
1/32+0.7
5608
1/ 3702
1/32+0.7
6856
1/ 13332
1/16
5620
1/ 3702
1/16
6579
1/ 11904
1/16+0.3
5647
1/ 3702
1/16+0.3
6440
1/ 10582
1/16+0.7
5657
1/ 3702
1/16+0.7
6216
1/ 8888
1/8
5677
1/ 3702
1/8
6126
1/ 7662
1/8+0.3
5674
1/ 3508
1/8+0.3
6072
1/ 6666
1/8+0.7
5610
1/ 2666
1/8+0.7
5954
1/ 5332
1/4
5568
1/ 2298
1/4
5907
1/ 4596
1/4+0.3
5566
1/ 1904
1/4+0.3
5867
1/ 3808
1/4+0.7
5656
1/ 1626
1/4+0.7
5837
1/ 2898
1/2
5646
1/ 1332
1/2
5844
1/ 2222
1/2+0.3
5681
1/ 1256
1/2+0.3
5738
1/ 1550
1/2+0.7
5649
1/ 832
1/2+0.7
5636
1/ 832
1/1
5549
1/ 316
1/1
5539
1/ 316
SEKONIC C-700
t0.1(S)
t0.1(S)
220V QT600IIM Prototype Test
Test Environment
Darkroom
Color Temperature
Test
Equipment
Testing Method
Trigger beyond 2 meters and average the amount of 3 tests.
Flash Duration
(t0.1)
IGBT control the time of turning on the flash
Stable Color Temperature Mode
High-Speed Flash (speed) Mode
CCT(K)
Level
Parameter
Color
Temperature
Flash Duration
Level
CCT(K)
Parameter
Color
Temperature
Flash Duration
SEKONIC C-700
t0.1(S)
t0.1(S)
1/128
5744
1/ 4938
1/128
9323
1/ 35086
1/128+0.3
5759
1/ 4694
1/128+0.3
9277
1/ 33332
1/128+0.7
5747
1/ 4444
1/128+0.7
9130
1/ 30302
1/64
5761
1/ 4444
1/64
8919
1/ 27776
1/64+0.3
5775
1/ 4444
1/64+0.3
8926
1/ 25640
1/64+0.7
5780
1/ 4444
1/64+0.7
8836
1/ 22222
1/32
5753
1/ 4444
1/32
8432
1/ 20202
1/32+0.3
5771
1/ 4444
1/32+0.3
8183
1/ 18518
1/32+0.7
5754
1/ 4444
1/32+0.7
7784
1/ 16666
1/16
5764
1/ 4444
1/16
7368
1/ 15150
1/16+0.3
5752
1/ 4444
1/16+0.3
6983
1/ 13332
1/16+0.7
5755
1/ 4444
1/16+0.7
6763
1/ 11494
1/8
5777
1/ 4444
1/8
6533
1/ 10100
1/8+0.3
5734
1/ 3920
1/8+0.3
6377
1/ 8546
1/8+0.7
5665
1/ 3030
1/8+0.7
6192
1/ 6872
1/4
5604
1/ 2468
1/4
6061
1/ 5648
1/4+0.3
5621
1/ 2468
1/4+0.3
5957
1/ 4566
1/4+0.7
5626
1/ 2222
1/4+0.7
5840
1/ 3508
1/2
5654
1/ 2082
1/2
5962
1/ 2656
1/2+0.3
5672
1/ 1514
1/2+0.3
5807
1/ 2014
1/2+0.7
5695
1/ 1148
1/2+0.7
5711
1/ 1148
1/1
5595
1/ 416
1/1
5579
1/ 416
In this mode, you can set the flash output from 1/1 full power to 1/16th power in 0.3 stop increments.
High Speed Sync enables the flash to synchronize with all camera shutter speeds. This is convenient when you
want to use aperture priority for fill-flash portraits.
Turn the Select Dial to set the
2
flash output power.
Press the <
MODE
> Button
1
so that < > is displayed.
High-Speed Sync
Please use the transmitter of
3
X1 series.
220V QT400IIM Prototype Test
Test Environment
Darkroom
Color Temperature
Test
Equipment
Testing Method
Trigger beyond 2 meters and average the amount of 3 tests.
Flash Duration
(t0.1)
IGBT control the time of turning on the flash
Stable Color Temperature Mode
High-Speed Flash (speed) Mode
CCT(K)
Level
Parameter
Color
Temperature
Flash Duration
Level
CCT(K)
Parameter
Color
Temperature
Flash Duration
MOD/OFF
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