Godox TT685C User manual

GODOX PHOTO EQUIPMENT CO.LTD
TTL Camera Flash
TT685C
For Canon
Foreword
Before using this product
Please read this user manual carefully in order to ensure your safety and the proper operation of
this product. Keep for future reference.
Thank you for purchasing this product.
This TT685C camera flash applies to Canon EOS series cameras and is compatible with E-TTL II
autoflash. With this E-TTL II compatible flash, your shooting will become simpler. You can easily
achieve a correct flash exposure even in complex light-changing environments. This camera flash
features:
zGN60 (m ISO 100, @200mm). 22 steps from 1/1 to 1/128.
zFully support Canon E-TTL II camera flash. Workable as Master or Slave unit in a wireless flash
group.
zUse dot-matrix LCD panel to make clear and convenient operations.
zWith built-in 2.4GHz wireless remote system to support transmitting and receiving.
zProvided multiple functions, include HSS (up to 1/8000s), FEC, FEB, etc.
zUse optional FT-16S to adjust flash parameters & trigger the flash.
zStable consistency and color temperature with good even lighting.

zSupport with firmware upgrade.
For Your Safety
zAlways keep this product dry. Do not use in rain or in damp conditions.
zThis product contains high-voltage electronic parts. Touching the high-voltage circuit inside it
may result in electric shock. Do not disassemble. Should repairs become necessary, this
product must be sent to an authorized maintenance center.
zStop using this product if it breaks open due to extrusion, falling or strong hit. Otherwise,
electric shock may occur if you touch the electronic parts inside it.
zDo not fire the flash directly into the eyes (especially those of babies) within short distances.
Otherwise visual impairment may occur. When taking pictures for babies, keep the flash unit at
least 1 meter (3.3 feet) away from them. Using bounce flash to reduce light intensity is also
recommended.
zDo not use the flash unit in the presence of flammable gases, chemicals and other similar
materials. In certain circumstances, these materials may be sensitive to the strong light
emitting from this flash unit and fire or electromagnetic interference may result.
zDo not leave or store the flash unit in places where the ambient temperature reads over 50°C
(e.g. in automobile). Otherwise the electronic parts may be damaged.
Contents
Foreword
For Your Safety
Name of Parts
Body

Control Panel
Dot-matrix LCD Panel
What’s in the Box of TT685C?
Separately Sold Accessories
Attaching to a Camera
Power Management
Flash Mode— E-TTL Autoflash
FEC (Flash Exposure Compensation)
FEB (Flash Exposure Bracketing)
FEL: Flash Exposure Lock
High-Speed Sync
Second-Curtain Sync
Flash Mode—M: Manual Flash
Flash Mode—Multi/Stroboscopic Flash
Wireless Flash Shooting: Optic Transmission
Wireless Settings
Master Unit’s Flash OFF
Setting the Communication Channel
ETTL: Fully Automatic Wireless Flash Shooting
ETTL: Use the Wireless Shooting of Flash Ratio
M: Wireless Flash Shooting with Manual Flash
Wireless Flash Shooting: Ratio (2.4G) Transmission
Other Applications
Wireless Control Function
Sync Triggering

Modeling Flash
Auto Focus Assist Beam
Bounce Flash
Creating a Catchlight
ZOOM: Setting the Flash Coverage and Using the Wide Panel
Low Battery Indicator
C.Fn: Setting Custom Functions
Control with the Camera’s Menu Screen
Protection Function
Technical Data
Troubleshooting
Firmware Upgrade
Compatible Camera Models
Maintenance
Conventions used in this Manual
zThis manual is based on the assumption that both the camera and camera flash’s power
switches are powered on.
zReference page numbers are indicated by “p.**”.
zThe following alert symbols are used in this manual:
The Caution symbol indicates a warning to prevent shooting problem.
The Note symbol gives supplemental information.

Name of Parts
zBody
01. Catchlight Panel
02. Built-in Wide Panel
03. Flash Head
04. Optic Control Sensor
05. Focus Assist Beam
06. Wireless Control Port
07. Sync Cord Jack
08. Hotshoe
09. Dot-marix LCD Panel
10. Lock Ring
11. Battery Compartment
12. USB Port
13. Slave Flash Ready Indicator
14. External power supply Socket
zControl Panel
15 < MODE > Mode Selection Button / Lock Button
16. < > Wireless Selection Button
17. Select Dial
18. <SET > Set Button
19. ON/OFF Power Switch
20. < > Test Button / Flash Ready Indicator

21. Function Button 1
22. Function Button 2
23. Function Button 3
24. Function Button 4
zLCD Panel
E-TTL Autoflash
M Manual Flash
Multi Flash
Radio Transmission Shooting/Optic Transmission Shooting
zMaster Unit
zSlave Unit
zWhat’s in the Box of TT685C?
1. Flash unit
2. Mini stand
3. Protection case
4. Instruction manual
zSeparately Sold Accessories
zThe display will only show the settings currently applied.
zThe functions displayed above function buttons 1 to 4, such as and
, change according to settings’ status.
zWhen a button or dial is operated, the LCD panel illuminated. (Page **)


The product can be used in combination with the following accessories sold separately, so as to
achieve best photography effects:
FT-16S power & trigger control, Car charger, Mini softbox, White & Silver reflector, Honeycomb,
Color gels, Snoot, etc.
Attaching to a Camera
1. Attach the Camera Flash.
Slip the camera flash’s mounting foot into the camera’s hotshoe all the way.
2. Secure the Camera Flash.
Rotate the lock ring on the mounting foot until it locks up.
3. Detach the Camera Flash.
Rotate the lock ring on the mounting foot until it is loosened.
Power Management
Use ON/OFF Power Switch to power the flash unit on or off. Turn off if it will not be used for an
extended period of time. Setting as a master flash, it will turn the power off automatically after a
certain period (approx. 90 seconds) of idle use. Pressing the camera shutter halfway or pressing
any flash button will wake up the flash unit. Setting as a slave flash, it will enter sleep mode after a
certain period (adjustable, 60 minutes by default) of idle use. Pressing any flash button will wake it
up.

Disabling Auto Power Off function is recommended when the flash is used off camera.
(C.Fn-APO, see p.)
Slave Auto Power Off Timer is set to 60 minutes by default. Another option “30
minutes” is available. (C.Fn-Sv APOT, see p.)


This flash has three flash modes: E-TTL, Manual (M), and Multi (Stroboscopic). In E-TTL mode, the
camera and the flash will work together to calculate the correct exposure for the subject and the
background. In this mode, multiple TTL functions are available: FEC, FEB, FEL, HSS, second
curtain sync, modeling flash, control with the camera’s menu screen.
* Press <MODE> Mode Selection Button and three flash modes will display on the LCD panel one
by one with each pressing.
ETTL Mode
Press <MODE > Mode Selection Button to enter E-TTL mode. The LCD panel will display
<>.
● Press the camera release button halfway to focus. The aperture and effective flash range
will be displayed in the viewfinder.
● When the shutter button is fully pressed, the flash will fire a pre-flash that the camera will
use to calculate exposure and flash output the instant before the photo is taken.
FEC: Flash Exposure Compensation
With FEC function, this flash can adjust from -3 to +3 in 1/3rd stops. It is useful in situations where
minor adjusting of the TTL system is needed based on the environment.
Setting FEC:
1. Press Function Button 2 < >. The icon < > and flash exposure compensation
amount will be highlighted on the LCD panel.
2. Set the flash exposure compensation amount.
● Turn the Select Dial to set the amount.
● “0.3”means 1/3 step, “0.7”means 2/3 step.
● To cancel the flash exposure compensation, set the amount to “+0”.

3. Press <SET > button again to confirm the setting.
FEB: Flash Exposure Bracketing
You can take three flash shots while automatically changing the flash output for each shot from
-3 to +3 in 1/3rd stops. The camera will record three images with different exposures: one
exposed according to camera calculations, one over-exposed and another under-exposed. Over
and under exposure amount is user adjustable. This function helps get correct exposure
especially in shooting moving objects or when environmental lights are complex.
1. Press function button 3 < >. The icon < > and the exposure bracketing amount
will be highlighted on the LCD panel.
2. Set the exposure bracketing amount.
● Turn the Select Dial to set the amount.
● “0.3”means 1/3 step, “0.7”means 2/3 step.
3. Press <SET> button again to confirm the setting. Then the FEC and FEB settings are
displayed on the LCD panel.
FEL: Flash Exposure Lock
FEL can lock the correct flash exposure setting for any part of the scene.
With <ETTL> displayed on the LCD panel, press the camera’s <FEL> button. If the camera does
not have the <FEL> button, press the < > button.
1. Focus the subject.
zFEB will be cancelled after three photos are taken.
zFor best results, set the camera drive mode to “single” and ensure the flash is ready before
shooting.
zFEB can be used with FEC and FEL.
You can prevent the FEB from being cancelled automatically after three photos are taken. (C.Fn-FEB
ACL)
The FEB shooting sequence can be changed. (C.Fn-FEB)

2. Press the <FEL> button.
* Aim the subject at the center of the viewfinder and press <FEL> button.
* The camera flash will fire a preflash and the required flash output for the subject is retained
in memory.
* Each time the <FEL> button is pressed, a preflash will be fired and a new flash exposure
setting will be locked.
High-Speed Sync
High Speed Sync (FP flash) enables the flash to synchronize with all camera shutter speeds. This is
convenient when you want to use aperture priority for fill-flash portraits.
1、Press Function Button 2 < > so that < > is displayed.
2、Check that < > is displayed in the viewfinder.
zIf the subject is too far away and underexposure, the < > icon will blink in the
viewfinder. Move closer to the subject and try the FE lock again.
zIf <ETTL> is not displayed on the LCD panel, FE lock cannot be set.
zIf the subject is too small, FE lock might not be very effective.
zIf you set a shutter speed that is the same as or slower than the camera’s
maximum flash sync speed, < > will not be displayed in the viewfinder.
zWith high-speed sync, the faster the shutter speed, the shorter the effective flash
range.
zTo return to normal flash, press < > button again. Then < > will
disappear.
zMulti flash mode cannot be set in high-speed sync mode.
zOver-temperature protection may be activated after 15 consecutive high-speed
sync flashes.