Godox TT685IIC User Manual

Conventions used in this Manual
●This manual is based on the assumption that both the camera and
camera flash’s power switches are powered on.
●Reference page numbers are indicated by “p.**”.
●The following alert symbols are used in this manual:
The Caution symbol indicates a warning to prevent shooting problem.
The Note symbol gives supplemental information.
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Thank you for purchasing this product.
This TT685IIC 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:
●Approx. GN60 (m ISO 100, @200mm), 81 steps from 1/1 to 1/128.
●Fully support Canon E-TTL II camera flash. Workable as
Transmitter or Receiver unit in a wireless flash group.
●Use dot-matrix LCD panel to make clear and convenient
operations.
●With built-in 2.4GHz wireless remote system to support
transmitting and receiving.
●Provided multiple functions, include HSS (up to 1/8000s), FEC,
FEB, etc.
●Stable consistency and color temperature with good even
lighting.
●Support with firmware upgrade.
Always keep this product dry. Do not use in rain or in damp
conditions.
Do not disassemble. Should repairs become necessary, this
product must be sent to an authorized maintenance center.
Keep out of reach of children.
Stop 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.
Do not fire the flash directly into the eyes (especially those of
babies) within short distances. Otherwise visual impairment
may occur.
Do not use the flash unit in the presence of flammable gases,
chemicals and other similar materials. In certain circumstance,
these materials may be sensitive to the strong light emitting
from this flash unit and fire or electromagnetic interference may
result.
Do not leave or store the flash unit if the ambient temperature
reads over 50℃. Otherwise the electronic parts may be
damaged.
Turn off the flash unit immediately in the event of malfunction.
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Thinklite TTL Camera Flash
Godox
TT685IIC

Godox TT685IIC Specifications

General

Type	Speedlite
Zoom Range	20-200mm
Color Temperature	5600K ± 200K
Mount	Hot shoe
Compatibility	Canon
Guide Number	60 m (ISO 100, 200mm)
Flash Modes	TTL, Manual, Multi
Recycle Time	0.1 - 2.6 seconds
Power Source	4 AA batteries
Flash Duration	1/300s to 1/20000s
Vari-Power	1/1 to 1/256
Swivel Angle	360 degrees
Wireless Functionality	Master and Slave modes (2.4GHz)

Summary

Foreword

Warning

Conventions used in this Manual

Name of Parts

Body

Details the physical components of the flash unit.

Control Panel

Details the buttons and controls on the flash unit's interface.

LCD Panel

E-TTL Autoflash

Explains the E-TTL autoflash mode operation and LCD display.

M Manual Flash

Details the manual flash mode and its LCD display.

Multi Flash

Explains the stroboscopic flash mode and its LCD display.

Radio Transmission Shooting

Covers radio transmission setup for transmitter and receiver units.

What's in the Box of TT685IIC Kit?

Separately Sold Accessories

Loading and Unloading the Battery

Attaching to a Camera

Power Management

Flash Mode—E-TTL Autoflash

FEC: Flash Exposure Compensation

Explains how to adjust flash exposure compensation for correct exposure.

FEB: Flash Exposure Bracketing

Describes the flash exposure bracketing function for capturing multiple exposures.

FEL: Flash Exposure Lock

High-Speed Sync

Second-Curtain Sync

M: Manual Flash

Optic S1 Secondary Unit Setting

Explains how to use the flash as an optic S1 secondary unit for wireless triggering.

Optic S2 Secondary Unit Setting

Details how to use the flash as an optic S2 secondary unit, ignoring pre-flashes.

Multi: Stroboscopic Flash

Calculating the Shutter Speed

Provides a formula to calculate appropriate shutter speeds for stroboscopic flash.

Maximum Stroboscopic Flashes

Wireless Flash Shooting: Radio (2.4G) Transmission

Positioning and Operation Range

Guidance on positioning units and expected wireless transmission range.

Wireless Multiple Flash Shooting

Explains how to set up and manage multiple receiver units for advanced wireless shooting.

Wireless Settings

Transmitter Unit Setting

How to configure the transmitter unit for wireless operation.

Receiver Unit Setting

How to configure receiver units for wireless operation.

Transmitter Unit's Flash OFF

Setting the Communication Channel

Wireless ID Settings

Scan the Spare Channel

ETTL: Fully Automatic Wireless Flash Shooting

Using Automatic Wireless Flash with Multiple Receiver Units

Using Fully Automatic Wireless Flash

About the Transmitter Unit

M: Wireless Flash Shooting with Manual Flash

Setting <M> Flash Mode

Setting the manual flash mode for wireless operation.

Multi: Wireless Flash Shooting with Manual Flash

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

Other Applications

Sync Triggering

How to use the sync cord jack for synchronized triggering.

Auto Focus Assist Beam

Explains the function and usage of the auto focus assist beam.

Bounce Flash

Technique for bouncing flash off surfaces to soften light and shadows.

ZOOM: Setting the Flash Coverage

Creating a Catchlight

C.Fn: Setting Custom Functions

Control with the Camera's Menu Screen

Setting Camera Flash Functions

Lists flash functions controllable via the camera menu.

Custom Functions of Camera Flash

Details specific custom function settings available for the flash unit.

Protection Function

Over-Temperature Protection

Details the flash's protection mechanism against overheating during use.

Prompts on LCD Panel

Technical Data

Troubleshooting

The Camera Flash does not fire.

Solutions for when the camera flash fails to fire.

The power turns off by itself.

Addresses issues where the flash unit powers off unexpectedly.

Auto zoom does not work.

Troubleshooting steps for when the auto zoom function is not operational.

The flash exposure is underexposed or overexposed.

Solutions for incorrect flash exposure results.

Photos have dark corners or only parts of the target subject are illuminated.

Solutions for issues with flash coverage causing dark areas.

Firmware Upgrade

Compatible Camera Models

Maintenance