Godox QT400IIM Flash Head Instruction Manual

: June 3, 2024
: Godox

Table of Contents

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Godox QT400IIM Flash Head

Foreword
Thank you for purchasing a GODOX product.
Thanks for choosing QTIII series high-speed flash. It has wide-range applicability, not only perfect for all kinds of studio and workshop photography, but also good at capturing fast changing actions in a chain of pictures in highspeed continuous shooting, e.g. action photography, stage photography, sports photography, scientific photography, etc. In addition, in fashion or portrait photography, photographers can capture a series of fast changing facial expressions and amazing moves, and clearly freeze each fleetingly perfect instant into eternal beauty. Among the benefits you’ll enjoy

Ultra-speedy charging, 0.07 -0.9s recycling time
Achieving 7/SOOOs high-speed sync
Up to 7 0 shots in one second under high-speed continuous shooting
Exact output control on LCD panel from 7 /256 to 7 /7
40W LED modeling lamp supports step less brightness adjustment
Outstanding output stability, less than 2% shifts when under the same output
High color stability, ranging within ±200k (stable mode) between flashes over the entire power range
Built-in Xl system {2.4G transmission)
Sl /S2 Receiver Mode
Delay function
Mask function
High qualified LCD panel

Warning
Please read the following warnings in their entirety before using this product.
Keep these safety instructions where users can read them for ready reference.

Do not disassemble or modify. Should the product break down, send the defective back to the authorized service center for inspection and maintenance.
Keep dry. Do not handle with wet hands, immerse in water, or expose to rain.
Keep out of reach of children.
Please put the device in a ventilation environment and keep the parts of lighting and heat dissipation holes are unobstructed. Do not use in flammable environment.
As this product adopts make and break device, please keep it easy to be used.
No touching the heating parts of this product.
Please turn off the power and wear insulated gloves before installing and connecting accessories. When replacing the tube or modeling lamp, please make sure that the tube is cool and wear insulated gloves to prevent burns.
Do not flash directly towards naked eyes (especially those of babies), otherwise it may lead to visual impairment.
Disconnect from the power supply when it will not be used for an extended period.

Caution

After 30 continuous flashes at full power, the flash should be cooled down for about 3 minutes. Overheating will occur if it is used continuously without cooling down.
Do not keep using the modeling lamp for a long time; otherwise flammable accessories attaching to flash head, e.g. softbox will get burnt. A 1 □-minute time is recommended in this case. After 10 minutes, cool it down for 1 minute.
When using a snoot, do not keep the modeling lamp on for a long time or fire too frequently (not over six times for one minute). Overheating will result in damages for strobe housing and/or studio light.
Avoid sudden impacts as this can damage the flash tube and/or modeling lamp.

Name of Parts

Body:

Light Sensor
Handle
Bracket
Direction Adjusting Handle
Lampshade Button
LED Modeling Lamp
Light Tube
Ventilation
Glass Lampshade
Bowen Mount
Umbrellas Input
Fan Air Inlet
Fan Air Outlet
Power Switch
Power Socket
Modeling Button
GR/CH Button
MODE/Wireless Button
Sl/S2 Button
Beep Button
RST(Sl/S2+Beep) Combined Button
Flash Button
Menu Button
Modeling Adjustment Button
DIM Select Dial
Locking Dial
Sleeve

LCD Panel:

Accessories

Light Body• 1
Light Cover• l
Glass Protection Cover *l
Instruction Manual *l
Power Cord *l
Lamp Tube *l

Separately Sold Accessories
The product can be used in combination with the following accessories sold separately, so as to achieve best photography effects: flash triggers and camera flashes with 2.4G wireless TX functions.Power Inverter, Softbox, Photographic Umbrella, Light Stand, Barndoor, Beauty Dish, Snoot, etc. Godox
QT400IIM Flash Head 10

Operations

Flash Preparation

Take down the lamp cover, install the light tube and put on the glass protection cover.
Attach the flash unit on an appropriate light stand. Adjust the mounting bracket for a good angle and make sure it’s tightened and fixed. Use the direction adjusting handle to adjust the flash on a desired direction. Umbrella input is for different photo umbrellas to put in.

Manual Flash
The flash output is adjustable from 1 /1 full power to 11256th power in 1 /10 stop increments. To obtain a correct flash exposure, use a hand-held flash meter to determine the required flash output.

Press button so that is displayed.
Turn the DIM Select Dial to choose a desired flash output amount.

Display Flash Duration
Flash duration refers to the length of time that from flash’s firing to reach the half peak at maximum. The half peak at maximum is usually expressed as 1=0.5. In order to provide the photographer with more concrete data, this product adopts t=0.l. The difference between t=0.5 and t=0. l is shown in the following picture.
Godox QT400IIM Flash Head 15

Flash duration will only be displayed in the M mode.

When adjusting the power output from high to low in this mode, Flash Ready Indicator will blink (the beeper will alarm). Now press the Test Button to discharge, and the flash can be used as normal.
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-Fl setting. These two modes are effective in M/Multi mode and ineffective in highspeed sync mode.
Stable Color Temperature Mode default: 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 tO.l =l/267 00, 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).

QT600IIIM

Test Environment| Darkroom
Color Temperature
Test| Equipment| SEKONIC C-800
Testing Method Trigger beyond l 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
Parameter
Level| Color Temperature CCT(K)| Flash Duration tO l(S)| Parameter
Level| Color Temperature
CCT(K)| | Flash Duration
t0 l(S)
1/256| 5734| 1/6010| 1/256| 8378| | 1/26100
1/256+03| 5760| 1/5560| 1/256+0.3| 8471| | 1/25800
1/256+0.7| 5745| 1/5420| 1/256+0.7| 8024| | 1/24700
1/128| 5729| 1/5170| 1/128| 9335| 7/24100
1/128+03| 5718| 1/4940| 1/128+0.3| 9108| 1/23400
1/128+07| 5686| 1/4830| 1/128+0.7| 9010| | 1/19300
1/64| 5619| 1/4680| 1/64| 8535| 1/16500
1/64+0.3| 5635| 1/4400| 1/64+0.3| 8205| | 7/73900
1/64+0.7| 5657| 1/3970| 1/64+0 7| 7698| | 1/12700
1/32| 5630| 1/3700| 1/32| 7367| 1/11400
1/32+0.3| 5639| 1/3530| 1/32+0.3| 7151| 1/10300
1/32+0.7| 5608| 1/3110| 1/32+0.7| 6856| 1/9500
1/16| 5620| 1/2940| 1/16| 6579| 1/8700
1/16+0.3| 5647| 1/2760| 1/16+0.3| 6440| 1/7800
1/16+0.7| 5657| 1/2360| 1/16+0.7| 6216| | 7/6700
1/8| 5677| 1/2090| 1/8| 6126| 1/5700
1/8+03| 5674| 1/1920| 1/8+03| 6072| 1/5000
1/8+0.7| 5610| 1/1670| 1/8+0.7| 5954| 1/4100
1/4| 5568| 1/1400| 1/4| 5907| 1/3500
1/4+0.3| 5566| 1/1250| 1/4+0.3| 5867| | 1/3000
1/4+0.7| 5656| 1/1060| 1/4+0.7| 5837| | 1/2200
1/2| 5646| 1/900| 1/2| 5844| 1/1600
1/2+0.3| 5681| 1/770| 1/2+0.3| 5738| 1/1200
1/2+0.7| 5649| 1/590| 1/2+0.7| 5636| 1/690
1/1| 5549| 1/530| 1/1| 5539| 1/530

High-Speed Sync
In this mode, you can set the flash output from 1 /1 full power to 1132nd power in 1 /10 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.

Press the Button so that< IP is displayed.
Turne th DIM Sekect Dial to set the flash output power.
Please use the transmitter of Xl series (optional).

With high-speed sync, the faster the shutter speed, the shorter the effective flash range.
Multi flash mode cannot be set in high-speed sync mode.
With high-speed sync, the color temperature is lower (decrease around 700K) because of tube’s characteristics. Please set the camera to AWB (Auto White Balance).

Multi: Stroboscopic Flash
In this mode, you can set the flash output from 1 /4th power to 11256th power in 1 stop increments. With stroboscopic flash, a rapid series of flashes is fired. It can be used to capture a multiple images of a moving subject in a single photograph. You can set the firing frequency (number of flashes per sec. expressed as Hz), the number of flashes, and the flash output.
Multi: Stroboscopic Flash

Press button so that is displayed.
Turn the DIM Select Dial to choose a desired flash output.
Set the flash frequency and flash times.

Press DIM Select Dial to select the flash times. Turn the DIM Select Dial to set the number.
Press DIM Select Dial to select the flash frequency.Turn the DIM Select Dial toset the number.

Calculating the Shutter Speed
During stroboscopic flash, the shutter remains open until the firing stops. Use the formula below to calculate the shutter speed and set it with the camera.
Number of Flashes/ Flash Frequency= Shutter Speed
For example, if the number of/lashes is 10 and the firing frequency is 5 Hz, the shutter speed should be at least 2 seconds.

Stroboscopic flash is most effective with a highly reflective subject against a dark background.
Using a tripod and a remote control is recommended.
A flash output of 1 /1 and 1 /2 cannot be set for stroboscopic flash.
If the number of flashes is displayed as”–“, the firing will continue until the shutter closes is exhausted. The number of flashes will be limited as shown by the following table.

Multi: Stroboscopic Flash
Maximum Stroboscopic Flashes: Godox QT400IIM Flash Head
39 Wireless Flash Shooting: Radio (2.4G) Transmission
QTIII adopts built-in 2.4G wireless X system, which is perfectly compatible with other products of our company. Nikon cameras (using X7 T-N, TT685N, etc.) and Canon cameras (using X7 T-C, TT685C, etc.) can enjoy one or more QTIII together. Godox QT400IIM Flash Head 22

As a receiver unit, QTIII can be controlled by the transmitter unit e.g.

AD360II-C, AD360II-N, TT685 series, V860II series, V7 series, XPro series, X2T series, XlT series, TT600, etc.
Wireless Flash Shooting: Radio (2.4G) Transmission

Wireless Settings

Press Wireless Button so that <@1♦> is displayed, entering the 2.4G wireless status now. Godox QT400IIM Flash Head 24 Setting the Communication Channel
If there are other wireless flash systems nearby, you can change the channel IDs to prevent signal interference. The channel IDs of the transmitter unit and the receiver unit(s) must be set to the same.

Long press the <GR/CH> Button for 2 seconds until the channel IDs is blinking.
Turn the DIM Select Dial to choose the channel from 7 to 32.
Press the DIM Select Dial to confirm.

Setting the Communication Group Godox QT400IIM Flash Head
28

Short press the <GR/CH> Button for 2 seconds until the group IDs is blinking.
Turn the DIM Select Dial to choose the channel from 7 to F.
Press the DIM Select Dial to confirm.

Receiver Model
Optical Sl Secondary Unit Setting
In M manual flash mode, press <Sl/S2> button so that this flash can function as an Optical Sl secondary flash with Optical sensor. With this function, the flash will fire synchronously when the main flash fires, the same effect as that by the use of radio triggers. This helps create multiple lighting effects. Godox QT400IIM Flash Head 31 Optical S2 Secondary Unit Setting
Press< Sl/S2> button so that this flash can also function as an Optical S2 secondary flash with Optical sensor in M manual flash mode. This is useful when cameras have pre-flash function. With this function, the flash will ignore a single “pre/lash” from the main flash and will only fire in response to the second, actual flash from the main unit. Godox QT400IIM Flash Head
32 Modeling Lamp
QTIII has a 40W LED modeling lamp whose brightness can be steplessly adJusted.

Short press the Modeling Lamp Button to choose the modeling lamp’s mode from OFF, Percentage and PROP.
OFF: Modeling lamp is off.
Percentage: Adjust the modeling lamp’s light brightness manually from l % to l 00%.
PROP: The modeling lamp’s power changes with the flash’s power.

The bigger power the flash has, the brighter the modeling lamp is. urn the Modeling Adjustment Button to choose the brightness frorn l % to 100%.

Tips: Short press the Modeling Adjustment Button can quickly turn on/off the modeling lamp.
Choose the Modeling Lamp’s Modes

Short press the MENU Button until Fn menu is displayed.
Press the OIM Select Dial to choose F4.
Turn the DIM Select Dial to choose the Modes:

ON: the modeling lamp will keep this status when triggering;
OFF: the modeling lamp will turn off when triggering; Short press the MENU Button to exit.

Buzz Function

Short press the Buzz Button to turn on/off the Beeper. When the buzz indicator is displayed on the LCD panel, it rneans the sound reminder is turned on; if not dislayed, the sound reminder is turned off. When Buzz function is turned on

The “Bl” beep will be heard when it’s fully charged.
The “Bl” beep will be heard when operate the buttons or select dials.

C.Fn: Setting Custom Function

Press the Menu Button until menu is displayed.
Press the DIM Select Dial to chooes Fn function signs.
Turn the DIM Select Dial to change the settings. Short press the MENU buttonto exit.

Custom Function Signs| Function| Setting No.| Settings & Description| Restrictions
---|---|---|---|---
Fl| Choose mode

flash

mode

Other Applications
Memory Function
The device is equipped with memory function for the panel setting. It will help remember the panel setting 3 second after you set it. When starting up the flash next time, the panel setting will be the same as the status before powering it off.
Tube Replacement
Shut down the power and remove the power cord before replacing the flash tube and wear insulated gloves. Then, pull out the old tube gently. Hold two feet of the new tube, and target directly towards the two copper outlets, then push them slightly in. Put on the glass protection cover after the tube is correctly installed. Godox QT400IIM Flash Head 38 Warning
Operating frequency :2412.99MHz – 2464.49MHz (only receive)

Declaration of Conformity

GODOX Photo Equipment Co.,Ltd. hereby declares that this equipment are in compliance with the essential requirements and other relevant provisions of Directive 2014/53/EU. In accordance with Article 10(2) and Article 10(10), this product is allowed to be used in all EU member states. For more information of Doc, Please click this web link:
https://www.godox.com/DOC/Godox_QTIIIM_Series_DOC.pdf
The device complies with RF specifications when the device used at 0mm from your body.

Technical Data

Godox QT400IIM Flash Head 40

Maintenance

Shut down the device immediately when it works abnormally and find out the reason.
Avoid sudden impacts and the lamp should be dedusted usually.
It’s normal for lamp being warm when in use. Avoid continuous flashes when it is not necessary.
Maintenance of all the flashes is up to our authorized maintenance department which can provide original accessories. Users can replace the flash tube and modeling lamp provided by the manufacturer.
One year warranty period will be cancelled when any unauthorized maintenance is found.
If the product had failures or was wetted, it can be continuously used only after it is repaired by professionals.
Disconnect the power when doing maintenance work or cleaning.
New changes made to the specifications or designs may not be updated in this manual.

FCC Statement
This device complies with part 15 of the FCC Rules. Operation is subject to the following two conditions:

This device may not cause harmful interference, and
this device must accept any interference received, including interference that may cause undesired operation.

Any Changes or modifications not expressly approved by the party responsible for compliance could void the user’s authority to operate the equipment.
Note:
This equipment has been tested and found to comply with the limits for a Class B digital device, pursuant to part 15 of the FCC Rules. These limits are designed to provide reasonable protection against harmful interference in a residential installation. This equipment generates uses and can radiate radio frequency energy and, if not installed and used in accordance with the instructions, may cause harmful interference to radio communications. However, there is no guarantee that interference will not occur in a particular installation. If this equipment does cause harmful interference to radio or television reception, which can be determined by turning the equipment off and on, the user is encouraged to try to correct the interference by one or more of the following measures:

Reorient or relocate the receiving antenna.
Increase the separation between the equipment and receiver.
Connect the equipment into an outlet on a circuit different from that to which the receiver is connected.
Consult the dealer or an experienced radio/TV technician for help.

The device has been evaluated to meet general RF exposure requirement. The device can be used in portable exposure condition without restriction.
Warranty
Dear customers, as this warranty card is an important certificate to apply for our maintenance service, please fill in the following form in coordination with the seller and safekeep it. Thank you1

Product Information	Model	Product Code Number

Customer
Information

| Name| Contact Number
Address
Seller Information| Name
Contact Number
Address
Date of Sale
Note:

Note: This form shall be sealed by the seller.
Applicable Products
The document applies to the products listed on the Product Maintenance Information (see below for further information). Other products or accessories (e.g. promotional items. give aways and additional accessories attached .etc.) are not included in this warranty scope.
Warranty Period
The warranty period of products and accessories is implemented according to the relevant Product Maintenance lnformation. The warranty period is calculated from the day(purchase date) when the product is bought for the first time. And the purchase date is considered as the date registered on the warranty card when buying the product.
How to Get the Maintenance Service
If maintenance service is needed, you can directly contact the product distributor or authorized service institutions. You can also contact the Godox after-sale service call and we will offer you service. When applying for maintenance service, you should provide valid wananty card. If you cannot provide valid warranty card, we may offer you maintenance service once confirmed that the product or accessory is involved in the maintenance scope, but that shall not be considered as our obligation.
Inapplicable Cases
The guarantee and service offered by this document are not applicable in the following cases:

The product or accessory has expired its warranty period;
Breakage or damage caused by inappropriate usage, maintenance or preservation, such as improper packing, improper usage, improper plugging in/out external equipment, falling off or squeezing by external force, contacting or exposing to the improper temperature, solvent, acid, base, flooding and damp environments, etc;
Breakage or damage caused by non-authorized institution or staff in the process of installation, maintenance, alternation, addition and detachment;
The original identifying information of product or accessory is modified, alternated, or removed;
No valid warranty card;
Breakage or damage caused by using illegally authorized, nonstandard or non-public released software;
Breakage or damage caused by force majeure or accident;
Breakage or damage that could not be attributed to the product itself.

Once met these situations above, you should seek solutions from the related responsible parties and Godox assumes no responsibility. The damage caused by parts, accessories and software that beyond the warranty period or scope is not included in our maintenance scope. The normal discoloration, abrasion and consumption are not the breakage within the maintenance scope.

Maintenance and Service Support Information

The warranty period and service types of products are implemented according to the following Product Maintenance Information:

Product Type| Name| Maintenance
Period(month)| Warranty Service Type
---|---|---|---
Parts| Circuit Board| 72| Customer sends the. product to designated site
Battery| | Customer sends the. product to designated site
Electrical parts e.g. battery charger, etc.| 72| Customer sends the, product to designated site
Other Items| Flash tube, modeling lamp, lamp body, lamp cover, locking device, package, etc| No| Without warranty

Godox After-sale Service Call 0755-29609320-8062