Godox AD400 Pro Wistro One Outdoor Flash User Guide

Optical 52 Secondary Unit Setting
Press< MENU > button to enter C.Fn-SLAVE to choose S2 function, 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 “preflash” from the main flash and will only fire in response to the second, actual flash from the main unit.
S1 and S2 optical triggering is only available in M manual flash mode.

Flash Mode – M: Manual Flash

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 t=0.5. In order to provide the photographer with more concrete data, this product adopts t=0.1. The difference between t=0.5 and t=0.1 is shown in the following picture.

Stable Color Temperature Function
When use this function, the color temperature changes within ±75K over the entire power range: enter MENU C.Fn-COLOR and set it as ON, which means the color temperature function is turned on. When adjusting the power output from high to low in M mode, Flash Ready Indicator will blink (the beeper will alarm for 1 minute). Now press the Test Button to discharge, and the flash can be used as normal.

Flash Mode – Multi: Stroboscopic Flash

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.

1. Press button so that is displayed.
2. Turn the Select Dial to choose a desired flash output.
3. Set the flash frequency and flash times.
   • Press Button to select the flash times. Turn the Select Dial to set the number.
   • Press Button to select the flash frequency. Turn the Select Dial to set the number.
   • After you finish the setting, press button and all the settings will be displayed.

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 flashes is 10 and the firing frequency is 5 Hz, the shutter speed should be at least 2 seconds.

CAUTION
To avoid overheating and deteriorating the flash head, do not use stroboscopic flash more than 10 times in succession. After 10 times, allow the camera flash to rest for at least 15 minutes. If you try to use the stroboscopic flash more than 10 times in succession, the firing might stop automatically to protect the flash head. If this happens, allow at least 15 minutes’ rest for the flash.

• 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.
• Stroboscopic flash can be used with”bulb”.
• If the number of flashes is displayed as “–“, the firing will continue until the shutter closes or the battery is exhausted. The number of flashes will be limited as shown by the following table.

Maximum Stroboscopic Flashes

Wireless Flash Shooting: Radio (2.4G) Transmission

• AD400Pro adopts Godox 2.4G wireless X system, which has good compatibility with other products of our company.
• As a slave unit, AD400Pro is automatically compatible with Canon E-TTL 11, Nikon i-TTL, Sony, Olympus, Panasonic and FUJIFILM system according to the master unit.
• As a slave unit, AD400Pro can be controlled by the following master units: XPro series, X1T series, AD360II series, V860II series, V350 series,TT685 series,TT600 series, TT350 series, etc.

Wireless Settings
Press <(If>)> Wireless Setting Button again until < > is displayed on the panel.

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 master unit and the slave unit(s) must be set to the same.

1. Long press the <GR/CH> Button for 2 seconds so that channels ID is displayed on the LCD panel.
2. Turn the Select Dial to choose a channel ID from 1 to 32.
3. Press the button to confirm.
4. Wireless ID setting: press the MENU button to enter C.Fn-lD and choose from 01 to 99 (Note: this can only be achieved when the master unit also has this function).

Setting the Communication Group
Short press the < GR/CH > Button to choose group ID from A to E.

Wireless Flash Shooting
Positioning and Operation Range (Example of wireless flash shooting)
Autoflash Shooting with One Slave Unit

• Use master unit with wireless transmitting function as the transmitter end.
• Before shooting, perform a test flash and test shooting.
• The transmission distance might be shorter depending on the conditions such as positioning of slave units, the surrounding environment and whether conditions.

Wireless Multiple Flash Shooting
You can divide the slave units into two or three groups and perform TTL autoflash while changing the flash ratio (factor). In addition, you can set and shoot with a different flash mode for each firing group.

• Auto Shooting with Two Slave Groups

• **Auto Shooting with Three Slave Groups

**

NOTE
The Reason & Solution of Not Triggering in Godox 2.4G Wireless

1. Disturbed by the 2.4G signal in outer environment (e.g. wireless base station, 2.4G wifi router, Bluetooth, etc.)
   To adjust the channel CH setting on the flash trigger (add 10+ channels) and use the channel which is not disturbed. Or turn off the other 2.4G equipment in working.

2. Please make sure that whether the flash has finished its recycle or caught up with the continuous shooting speed or not{the flash ready indicator is lighten) and the flash is not under the state of over-heat protection or other abnormal situation.
   Please downgrade the flash power output. If the flash is in TTL mode, please try to change it to M mode(a preflash is needed in TTL mode).

3. Whether the distance between the flash trigger and the flash is too close or not
   Please turn on the “close distance wireless mode” on the flash trigger (< 0.5m):

   • X1 series: press the test button and hold on, then turning it on until the flash ready indicator blinks for 2 times.
   • XPro series: Set the C.Fn-DIST to 0-30m.

4. Whether the flash trigger and the receiver end equipment are in the low battery states or not
   Please replace the battery{the flash trigger is recommended to use 1.5V disposable alkaline battery).

C.Fn: Setting Custom Functions

1. Press< MENU> Button to enter C.Fn menu. The “Ver x.x” in the top-right corner refers to the software version.

2. Select the Custom Function Signs.
   Turn the Select Dial to select the Custom Function Signs.

3. Change the Selling.

   • Press button and the setting signs are highlighted.
   • Turn the Select Dial to set the desired number. Press button will confirm the settings.

4. Exit C.Fn Menu.
   Press

   Button to exit.

Modeling Lamp

AD400Pro is equipped with a 30W LED modeling lamp which has two continuous lighting modes.

• There are three modes: OFF, Percentage and PROP. Short press the Modeling Lamp Button, and the three mode will be displayed on the LCD panel in sequence:
  1. OFF: the modeling lamp is off.
  2. Percentage: 10%-100%(to prevent overheat, <30% the fan rotates in low speed while >30% in high speed).
  3. PROP: The modeling lamp’s power changes with the flash’s power. The bigger power the flash has, the brighter the modeling lamp is(to prevent overheat, <1/64 the fan rotates in low speed while >1/64 in high speed).
• Long press the modeling lamp for 2 seconds to adjust the percentage of modeling lamp from 10% to 100%.

Other Applications

Sync Triggering
The Sync Cord Jack is a cD3.5mm plug. Insert a trigger plug here and the flash will be fired synchronously with the camera shutter.

Protection Function

Over-Temperature Protection

• To avoid overheating and deteriorating the flash head, do not fire more than 75 continuous flashes in fast succession at 1/1 full power. After 75 continuous flashes, allow a rest time of at least 5 minutes.
• If you fire more than 75 continuous flashes and then fire more flashes in short intervals, the inner overtemperature protection function may be activated and make the recycling time over 10 seconds. If this occurs, allow a rest time of about 5 minutes, and the flash unit will then return to normal.
• When the over-temperature protection is started, fil is shown on the LCD display.
• Number of flashes that will activate over-temperature protection:
  ** Power Output Level| Number of Flashes**
  ---|---
  1/1|
  1/2 (+0.7-+0.9)| 100
  1/2 (+0.3-+0.6)| 120
  1/2 (+0.0-+0.2)| 150
  1/4 (+0.0-+0.9)| 200
  1/8 (+0.0-+0.9)| 300
  1/16 (+0.0-+0.9)| 400
  1/32 (+0.0-+0.9)| 500
  1/64 (+0.0-+0.9)| 1000
  1/128 (+0.0-+0.9)|
  1/256 (+0.0-+0.9)|
• Number of flashes that will activate over-temperature protection in high-speed sync triggering mode:
  Power Output| Times
  ---|---
  1/1| 50
  1/2 (+0.0-+0.9)| 60
  1/4 (+0.0-+0.9)| 75
  1/8 (+0.0-+0.9)| 100
  1/16 (+0.0-+0.9)| 150
  1/32 (+0.0-+0.9)| 200
  1/64 (+0.0-+0.9)|
  1/128 (+0.0-+0.9)| 300
  1/256 (+0.0-+0.9)|

Other Protections
The system provides real-time protection to secure the device and your safety. The following lists prompts for your reference:

Technical Data

Troubleshooting

If there is a problem, refer to this Troubleshooting Guide.
The flash exposure is underexposed or overexposed.

• You used high-speed sync.
  With high-speed sync, the effective flash range will be shorter. Make sure the subject is within the effective flash range displayed.

• You used Manual Flash mode.
  Set the flash mode to TTL or modify the flash output.

Firmware Upgrade

This flash supports firmware upgrade through the USB port. Update information will be released on our official website.

• USB connection line is not included in this product. As the USB port is a Type-C USB socket, please use the Type-C USB line.
• As the firmware upgrade needs the support of Godox G3 software, please download and install the “Godox G3 firmware upgrade software” before upgrading. Then, choose the related firmware file.
• As the products needs to do firmware upgrade, please refer to instruction manual of the newest electric version as final.

Maintenance

• Shut down the device immediately should abnormal operation be detected.
• Avoid sudden impacts and the product should be dedusted regularly.
• It is normal for the flash tube to be warm when in use. Avoid continuous flashes if unnecessary.
• Maintenance of the flash must be performed by our authorized maintenance department which can provide original accessories.
• This product, except consumables e.g. flash tube, is supported with a one-year warranty.
• Unauthorized service will void the warranty.
• If the product had failures or was wetted, do not use it until it is repaired by professionals.
• Changes made to the specifications or designs may not be reflected in this manual.

FCC

This device complies with part 15 of the FCC Rules. Operation is subject to the following two conditions: (1) This device may not cause harmful interference, and (2) 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.

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_AD400Pro_DOC.pdf
The device complies with RF specifications when the device used at 0mm from your body.

ABOUT COMPANY

• GODOX Photo Equipment Co., Ltd.
• 1st to 4th Floor, Building 211st to 4th Floor, Building 4, Yaochuan Industrial Zone, Tangwei Community, Fuhai Street, Bao’an District, Shenzhen 518103, China
• Tel: +86-755-29609320(8062)
• E-mail: godox@godox.com
• 705-AD600P-06
• Fax: +86-755-25723423
• http://www.godox.com

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