Godox TT685 TTL CAMERA FLASH User Guide

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

Use the supplied mini stand to position the Receiver unit.

• Before shooting, perform a test flash and test shooting.
• The transmission distance might be shorter depending on the conditions such as positioning of Receiver units, the surrounding environment and whether conditions.

Wireless Multiple Hash Shooting
You can divide the Receiver units into two or three groups and perform E-TTL II autoflash while changing the flash ratio (factor). In addition, you can set and shoot with a different flash mode for each firing group, for up to 4 groups.

• Auto Shooting with Two Receiver Groups

• Auto Shooting with Three Receiver Groups

• Shooting with a Different Flash Mode set for Each Group

• The flash mode settings are indicated only as an example

  1. Wireless Settings
     You can switch between normal flash and wireless flash. For normal flash shooting, be sure to set the wireless setting to OFF.
     Transmitter Unit Setting
     Press < > button so that < ) > is displayed on the LCD panel.

Receiver Unit Setting
Press button so that < ( ) > or < > are displayed on the LCD panel.

2. Transmitter Unit’s Flash OFF
   When the Transmitter unit is set to OFF, only the Receiver units will fire a flash.
   1 Press < MENU> Button to enter C.Fn Transmitter setting.
   2 Set Transmitter to ON/OFF to ;ontrol the On/Off of the transmitter unit.

   < >: The Transmitter unit lash firing is ON. < >: The Transmitter unit lash firing is OFF. • Even if the Transmitter unit lash firing is disabled, it still ‘fires a preflash to transmit wireless signals. 

3. 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.
   1 Press

   Button to enter C.Fn CH setting.
   
   2 In C.Fn CH, turn the Select Dial 4 to choose channel ID from 1 to 32.
   3 Press the Set Button to confirm.

4.   Wireless ID Settings
   Change the wireless channels and wireless ID to avoid interference for it can only be triggered after the wireless IDs and channels of the Transmitter unit and the Receiver unit are set to the same.Press the

   button to enter C.Fn ID. Press the Set Button to choose OFF channel expansion shutdown, and choose any figure from 01 to 99.

5. Scan the Spare Channel
   To avoid the interference of using the same channel by others, this function can be used: enter the C.Fn settings and find the SCAN option. When setting it to START, it will scan from 1% to 100%. And the 8 spare channels will be displayed after the scan is completed.

6. ETTL: Fully Automatic Wireless Flash Shooting

Using Automatic Wireless Flash with a Single Receiver Unit

1. Transmitter Unit Setting
   • Attach a TT6851IC camera flash on the camera and set it as the Transmitter unit.
   • X1T-C can also be used as Transmitter unit. X1T-C can control TT685IIC ‘s ZOOM value when the ZOOM is adjusted to auto (A) mode.

2. Receiver Unit Setting
   • Set wireless controlled TT6851IC as the wireless Receiver Unit.

3.  Check the communication channel.
   • If the Transmitter unit and Receiver unit(s) are set to a different channel, set them to the same channel.

4.  Position the camera and flashes.
   • Position the camera and flashes as the picture shows.

5.  Set the Transmitter unit’s flash mode to .
   • Set the Transmitter unit’s flash mode to .
   • For shooting, will automatically be set for the Receiver unit.
   • Set the Transmitter unit flash firing as ON to fire a flash.

6. Check that the flash is ready.
   • Check that the Transmitter flash ready indicator is lightened.
   • When the Receiver flash ready indicator is ready, the AF-assist beam lighting area will blinks at 1 second intervals.

7.  Check the flash operation.
   • Press the Transmitter unit’s Test Button < >.
   • Then, the Receiver unit will fire. If not, adjust the Receiver unit’s angle toward the Transmitter unit and distance from the Transmitter unit.

Using Automatic Wireless Flash with Multiple Receiver Units
When stronger flash output or more convenient lighting operation is needed, increase the number of Receiver units and set it as a single Receiver unit. To add Receiver units, use the same steps as setting”automatic wireless flash with a single Receiver unit”. Any flash group can be set (A/B/C/D/E).When the number of Receiver units is increased and the Transmitter unit flash firing is ON, automatic control is implemented to make all groups of flashes fire the same flash output and ensure the total flash output up is to standard exposure.

•  Press the depth-of-field preview button on the camera to fire a modeling flash.
• If the Receiver unit’s auto power off function is workable, press the Transmitter unit’s test button to power it on. Please note that test firing is unavailable during the camera’s regular metering time.
• The effective time of Receiver auto power off is changeable.
• By making some settings, the auto AF-assist transmitter will not blink after the Receiver unit’s flash ready indicator is lightened.

Using Fully Automatic Wireless Flash
The FEC and other settings that set on the Transmitter unit will also be appeared on the Receiver unit automatically. The Receiver unit does not need any operation. Use the following settings to make wireless flashes according to the same methods with normal flash shooting.

•  Flash Exposure Compensation
• Flash Exposure Lock
• Manual Flash
• Stroboscopic Flash

About the Transmitter Unit
Use two or more Transmitter units. By preparing several cameras that with Transmitter units flash attached, cameras can be changed in shooting while keeping the same lighting source (Receiver unit).

M: Wireless Flash Shooting with Manual Flash

This describes wireless (multiple shooting) using manual flash. You can shoot with a different flash output setting for each Receiver unit (firing group). Set all parameters on the Transmitter unit.

1. Setting the flash mode to .

2. Setting flash output. 4
   • Press FunctionButton 1 /2/3/4<A/B/C/D>. Turn the Select Dial to set the flash output of the groups. Press Set Button to confirm.
   

3. Taking the picture.
   • Each group fires at the set flash ratio.

Setting Flash Mode
You can directly operate the Receiver unit to manually set the manual flash or stroboscopic flash.

1. Setting the Receiver unit.
2. Setting flash mode to .
   • Press button so that is displayed.
   • Set the manual flash output.

Multi: Wireless Flash Shooting with Manual Flash

1. Setting stroboscopic flash.
   • Press button so that is displayed.
   • Setting the stroboscopic flash.

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 (0.5m). > Please turn on the “close distance wireless mode” on the flash trigger X2 & 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).

Other Applications

Sync Triggering
The Sync Cord Jack is a 4)2.5mm plug. Insert a trigger plug here and the flash will be fired synchronously with the camera shutter.
Auto Focus Assist Beam
In poorly-lit or low-contrast shooting environments, the built-in auto focus assist beam will automatically light on to make it easier for autofocus. The beam will light up only when autofocus is difficult and get out as soon as the autofocus becomes correct.
If you want to turn off the auto focus assist beam, set the “AP to “OFF” on the C.Fn settings.

• If you find the auto focus assist beam does not light up, this is because the camera has got a correct autofocus.

Bounce Flash
By pointing the flash head toward a wall or ceiling, the flash will bounce off the surface before illuminating the subject. This can soften shadows behind the subject for a more natural-looking shot. This is called bounce flash.
To set the bounce direction, hold the flash head and turn it to a satisfying angle.

• If the wall or ceiling is too far away, the bounced flash might be too weak and result in underexposure.
• The wall or ceiling should be a plain, white color for high reflectance. If the bounce surface is not white, a color cast may appear in the picture.

Creating a Catchlight
With the catchlight panel, you can create a catchlight in the subject’s eyes to add life to the facial expression.

1. Point the flash head upward by 90°.
2. Pull out the wide panel. The catchlight panel will come out at the same time.
3. Push the wide panel back in.
   • Push in only the wide panel.
   • Follow the same procedures as for bounce flash.
   Notes:
   • Point the flash head straight ahead and then upward by 90°. The catchlight will not appear if you swing the flash head left or right.
   • For maximum catchlight effect, stay 1.5m/4.9ft away from the subject.

ZOOM: Setting the Flash Coverage
The flash coverage can be set automatically or manually. It can be set to match the lens focal length from 20mm to 200mm.

In Manual Zoom mode, press the < ZOOM> button.

• Turn the Select Dial to change the flash coverage.
• If < A > is displayed, the flash coverage will be set automati­

If you set the flash coverage manually, make sure it covers the lens focal length so that the picture will not have a dark periphery.
Low Battery Warning

If the battery power is low, < > will appear and blink on the LCD panel. Please replace the battery immediately.
C.Fn: Setting Custom Functions
The following table lists the available and unavailable custom functions of this flash.

C.Fn Custom Functions

Custom Function Signs| Function| Setting No.| Settings & Description
m/ft| Distance indicator| m| m
ft| feet
AF| AF-assist beam RX| ON| ON
OFF| OFF
STBY| Auto sleep setting| ON| ON
OFF| OFF
RX STBY| Receiver auto power off timer| 60min| 60min
30min| 30min
SCAN| Scan the spare channel| OFF| OFF
START| Start to find the spare channel
CH| Channel setting| 01 — 32| Choose channels from 01-32
ID| Wireless ID| OFF| Off
01-99| Choose any figure from 01-99
BEEP| Beeper| ON| ON
OFF| OFF
LIGHT| Backlighting time| 12sec| Off in 12 sec.
OFF| Always off
ON| Always lighting
LCD| LCD contrast ratio| -3—+ 3| 7 levels
FEB ACL| FEB auto cancel| ON| ON
---|---|---|---
OFF| OFF
TX| Transmitter unit control| | OFF
| ON
TX DIST| Firing distance| 1-100m 0-30m| 1-100m firing 0-30m firing

1. Press

   Button until C.Fn menu is disp ayed. The “Ver x” in the top-right corner refers to the software version.

2. Select the Custom Function No.
   Turn the Select Dial to select the Custom Function No.

3. Change the Setting.
   Press Set Button and the Setting No. blinks.
   Turn the Select Dial to set the desired number. Pressing Set Button will confirm the settings.
   After you set the Custom Function and press < MENU> button, the camera will be ready to shoot.

4. In the C.Fn states, long press the “Clear”button for 2 seconds until “OK”is displayed on the panel, which means the values in C.Fn can be reset.

Control with the Camera’ s Menu Screen

If the camera flash is attached to an EOS camera which has a speedlite control function, the flash can be controlled using the camera’s menu screen. For the menu operation procedure, refer to your camera’s instruction manual.

• Setting Camera Flash Functions

The following flash functions are settable according to different flash modes.

1. Flash mode
2. Shutter sync (1st/2nd curtain, high speed sync)
3. FEB
4. Flash exposure compensation
5. Flash firing
6. Clear camera flash’s settings

• Custom Functions of Camera Flash

C.Fn-00, C.Fn-01, C.Fn-03, C.Fn-08, C.Fn-10, C.Fn-20, C.Fn-22.

• Screens from the EOS-1 D Mark
• If flash exposure compensation has already been set with the camera flash, flash exposure compensation cannot be set with the camera. To set it with the camera, the camera flash’s flash exposure compensation must be set to zero.
• If any Flash Custom Functions and flash settings other than flash exposure compensation have been set by both the camera and the flash, the latest settings will take effect.

**Protection Function

**

1 Over-Temperature Protection

• To avoid overheating and deteriorating the flash head, do not fire more than 40 continuous flashes in fast succession at 1/1 full After 40 continuous flashes, allow a rest time of at least 10 minutes.
• If you fire more than 40 continuous flashes and then fire more flashes in short intervals, the inner over-temperature protection function may be activated. If this occurs, allow a rest time of about 10 minutes, and the flash unit will then return to normal.
• When the over-temperature protection is started, 4 is shown on the LCD display.

Number of flashes that will activate over-temperature protection:

Number of Flashe

| 20| 24| 28| 35| 50| 70| 80| 105| 135| 200
---|---|---|---|---|---|---|---|---|---|---
1/1| 40| 50| 50| 60| 60| 70| 70| 80| 80| 80
1/2| 50| 60| 60| 75| 75| 100| 100| 100| 100| 100
1/4| 100| 100| 100| 100| 120| 150| 150| 150| 150| 150
1/8| 200| 200| 200| 200| 200| 200| 200| 200| 200| 200
1/16| 300| 300| 300| 300| 300| 300| 300| 300| 300| 300
1/32| 500| 500| 500| 500| 500| 500| 500| 500| 500| 500
1/64| 1000| 1000| 1000| 1000| 1000| 1000| 1000| 1000| 1000| 1000
1/128| 2000| 2000| 2000| 2000| 2000| 2000| 2000| 2000| 2000| 2000

Number of flashes that wit activate over-temperature protection in high- speed sync triggering mode:

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

Please restart the flash unit. If the problem still exists, please send this product to a maintenance center.

E2| The system gets excessive heat. Please allow a rest time of 10 minutes.
E3| The voltage on two outlets of the flash tube is too high. Please send this product to a maintenance center.
E9| There are some errors occurred during the upgrading process. Please using the correct firmware upgrade method.

Technical Data

Model TT6851IC

Compatible Cameras| Canon EOS cameras (E-TTL II autoflash)
Guide No.(1/1 output, 200mm)| GN:–60 (m IS0100)
Flash Coverage| 20 to 200mm
·    Auto zoom (Flash coverage set automatically to match the lens focal length and image size)
Manual zoom

·    Swinging/tilting flash head (bounce flash): 0 to 330° horizontally and -7° to 120° vertically

Flash Duration| 1/300 to 1/20000 seconds
·    Exposure Control
Exposure control system| E-TTL II autoflash and manual flash
Flash exposure compensation (FEC)| Manual. FEB: ±3 stops in 1/3 stop increments (Manual FEC and FEB can be combined.)
FE lock| With button or< > button
Sync mode| High-speed sync (up to 1/8000 seconds), first-curtain sync, and second-curtain sync
Multi flash| Provided (up to 100 times, 199Hz)
·    Wireless Flash (2.4G Radio Transmission)
Wireless flash function| Transmitter, Receiver, Off
Transmitter groups| A, B, C, D
Controllable Receiver groups| A, B, C, D, E (E group can be controlled by X series flash trigger)
Transmission range (approx.)| 100m
Channels| 32 (1-32)
ID| 01-99
Modeling flash| Fired with camera’s depth-of-field preview button
·    Auto Focus Assist Beam
Effective range (approx.)| Center 0.6-10m
Periphery: 0.6-5m
·    Power Supply
Power source| NI-MH battery(recommended) or LR6 alkaline battery4
Recycle time| 0.1-2.6s (Rechargeable Ni-MH Battery)
Full power flashes| About 290 times
Power saving| Power off automatically after approx. 90 seconds of idle operation. (60 minutes if set as Receiver)
·    Sync Triggering Mode            Hotshoe, 2.5mm sync line
Working temperature| -10 C -50 C
• Dimensions

WxHxD| 64.76.190 mm
Weight without battery| 405g
Weight with battery| 489g
2.4G Frequency Range| 2413.0MHz-2465.0MHz
Max. Transmitting Power| 5dbm

Troubleshooting

If there is a problem, refer to this Troubleshooting Guide.

The Camera Flash does not fire.

• The camera flash is not attached securely to the camera.
  →Attach the camera’s mounting foot securely to the camera.
  The electrical contacts of the Camera Flash and camera are dirty.
  → Clean the contacts.

  < > or < > is not displayed in the view finder of camera. >Wait until the flash is fully recycled and the flash ready indicator lights up. → lf the flash ready indicator lights up, but <   > or < ** > **is not displayed in the view finder, check whether this flash unit is securely attached to the camera hotshoe. → lf the flash ready indicator does not light up after a long wait, check whether the battery power is enough. If the battery power is low, < o > will appear and blink on the LCD panel. Please replace the battery immediately. **The power turns off by itself.**

• After 90 seconds of idle operation, auto power off took effect if the flash is set as Transmitter.
  Press the shutter button halfway or press any flash button to wake up.

• After 60 minutes (or 30 minutes) of idle operation, the flash unit will enter sleep mode if it is set as Receiver.
  Press any flash button to wake up.
  Auto zoom does not work.
  

• The camera flash is not attached securely to the camera. >Attach the camera flash’s mounting foot to the camera.
  The flash exposure is underexposed or overexposed.
  There was a highly reflective object (e.g. glass window) in the
  → Use FE lock (FEL).

• 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 ETTL or modify the flash output.
  Photos have dark corners or only parts of the target subject are illuminated.
  

• The focal length of lens exceeds the flash coverage.
  → Check the flash coverage you set. This flash unit has the flash coverage between 20 and 200mm, which fits medium-format cameras.

Firmware Upgrade

•  The USB port is a Type-C USB socket. Type-C USB connection line is applicable.
• 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 product needs to do firmware upgrade, please refer to instruction manual of the newest electric version as final.

This flash unit can be used on the following Canon EOS series camera models:
5DMarkll 70D 6D 7D 60D 50D 30D 600D 90D 5DMark IV 7D Mark II 7600 750D 80D 500D 77D
R EOS 1DX 200D II 800D
ro This table only lists the tested camera models, not all Canon EOS series cameras. For the compatibility of other camera models, a self-test is recommended. Rights to modify this table are retained.

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 Statement

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.

The device has been evaluated to meet general RF exposure requirement. The device can be used in portable exposure condition without restriction.
Warning
Operating frequency:2412.99MHz-2464.49MHz Maximum EIRP Power4.94dBm
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:For more information of DoC, Please click this web link: http://www.godox.com/DOC/Godox_TT68511_Series_DOC.pdf. The device complies with RF specifications when the device used at 0mm from your body.

GODOX Photo Equipment Co., Ltd.
Add: Building 2, Yaochuan Industrial Zone, Tangwei Community, Fuhai Street Bao’an
District Shenzhen, 518103 China Tel: +86-755-29609320(8062)
Fax: +86-755-25723423 E-mail: godox@godox.com
godox.com
Made in China

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