GODOX TT685II-C Flash for Canon User Manual

Introduction

This manual provides comprehensive instructions for the safe and effective operation of your GODOX TT685II-C Flash. Please read this manual thoroughly before use to ensure optimal performance and to prevent damage to the unit or other equipment. The TT685II-C is an upgraded overhead flash designed for Canon cameras, featuring the Godox 2.4G wireless X system, quick-release lock, wide light coverage, and TCM instant conversion.

What's in the Box

• 1x Godox TT685II Flash for Canon
• 1x Mini Stand
• 1x Protection Case
• 1x Instruction Manual

Figure 1: Included components of the Godox TT685II-C Flash package.

Product Features

Godox 2.4G Wireless X System

The TT685II-C is equipped with the Godox 2.4G wireless X system, allowing for seamless connectivity with compatible flashes or flash triggers. This system supports multiple groups (A, B, C, D, E) and 32 channels (1-32) with a transmission range of approximately 100m. It can function as both a transmitter and a receiver unit.

Figure 2: The Godox 2.4G Wireless X System in action.

Figure 3: Transmitter and Receiver Flash configurations.

Quick-Release Lock

The TT685II-C features a quick-release lock mechanism for fast and secure mounting onto your camera's hot shoe. This design ensures a smooth setup, crucial for capturing critical moments efficiently.

Figure 4: Detail of the quick-release lock.

Wide Light Coverage

This flash offers both auto and manual zoom capabilities, with flash coverage adjustable from 20-200mm to match various lens focal lengths. With a guide number of approximately 60 (m ISO100 at 200mm), it provides broad and even light distribution for diverse shooting scenarios.

Figure 5: The flash head designed for wide light coverage.

TCM Instant Conversion

The TCM (TTL Converted to Manual) function enhances shooting efficiency by allowing instant conversion from TTL (Through-The-Lens) to manual mode. This feature helps to lock in the proper exposure value, ensuring consistent and accurate light expression with every flash.

Figure 6: TCM function display on the flash unit.

Bounce Angle

The flash head can be swiveled and tilted to achieve various bounce angles, providing flexible lighting options. It can rotate 0-330° horizontally and -7°-120° vertically.

Figure 7: Adjustable bounce angles for versatile lighting.

High-Speed Sync (HSS)

The TT685II-C supports High-Speed Sync (HSS) up to 1/8000s, allowing you to use wider apertures in bright conditions or freeze fast-moving subjects. It also supports first-curtain sync and second-curtain sync.

Figure 8: High-Speed Sync for freezing motion.

Power Supply & Recycle Time

The flash is powered by 4x AA batteries (Ni-MH recommended). It provides approximately 330 full power flashes with a recycle time of 0.1-2.6 seconds (with rechargeable Ni-MH batteries). Power saving mode automatically turns off the unit after 90 seconds of idle operation (60 minutes if set as a receiver).

Figure 9: Battery compartment for 4x AA batteries.

USB Update Port

The flash unit includes a Type-C USB port for firmware updates, ensuring compatibility and access to future enhancements. It also features a 2.5mm sync line jack for wired triggering.

Figure 10: USB Type-C port and sync jack.

Setup

Battery Installation

To install batteries, uncover the battery compartment by pushing it to the top. Insert four AA batteries, ensuring correct polarity. Recover the compartment by pushing it back into place.

Mounting on Camera

Align the flash unit with your camera's hot shoe. Slide the flash onto the hot shoe until it clicks into place. Rotate the quick-release button to fix the connection securely.

Connecting to External Power (Optional)

For shorter recycling times, the TT685II-C can be connected to an external power pack like the Godox PB960. Ensure batteries are installed in the flash. Uncover the socket of the power pack, plug in the Propac cable, and screw the knob to fix the connection. Then, plug the Propac cable into the power port on the flash unit.

Operating Instructions

Control Panel Overview

The control panel features function buttons (1-4), a menu button, test button/flash ready indicator, power switch, wireless selection button, select dial, focus length setting, power output, mode selection button, set button, and lock button.

Figure 11: Control Panel Layout.

Basic Operation

Power On/Off

Push the power switch to turn the unit on or off.

Mode Selection (ETTL/M/Multi)

Short press the MODE button to cycle through ETTL, Manual (M), and Multi-flash modes.

Wireless Operation (Transmitter/Receiver)

The TT685II-C can operate as a Transmitter Unit (TX) or a Receiver Unit (RX) within the Godox 2.4G Wireless X System.

Setting as Transmitter Unit (TX)

1. Short press the Wireless Selection Button to select Transmitter Unit (TX).
2. Set the channel of the TT685II-C to match the receiver flashes (e.g., "28").
3. Set the ID of the flash trigger to match the receiver flashes (e.g., "23").
4. Set the group of the flash trigger to match the receiver flashes (e.g., "D").
5. Adjust the FEC (Flash Exposure Compensation) amount of the AD100Pro (or other receiver flash).
6. Press the Flash Button to trigger a flash, ensuring successful connection.

Setting as Receiver Unit (RX)

1. Short press the Wireless Selection Button to select Receiver Unit (RX).
2. Set the channel of the flash trigger to match the TT685II-C (e.g., "28").
3. Set the ID of the flash trigger to match the TT685II-C (e.g., "23").
4. Set the group of the flash trigger to match the TT685II-C (e.g., "E").
5. Adjust the FEC amount of the TT685II-C.
6. Press the flash button on the trigger to trigger a flash, making sure successful connection.

Flash Exposure Bracketing (FEB)

The FEB function allows the flash to take three shots while automatically changing the output for each shot from -1.3 to +1.3 in 1/3rd stops. To activate, short press the FEB button, turn the dial to set the FEB amount, and short press the SET button to confirm.

Multi-Flash Mode

In Multi-flash mode, the flash fires a series of rapid flashes. Short press the +/- button and turn the dial to set the flash output. Short press the Times button to set the flash times, and short press the Hz button to set the flash frequency (Hz: flashes per second).

Zoom Function

Short press the ZOOM button, then turn the dial to set the focal length. Short press the SET button to confirm. The flash coverage can be set from 20mm to 200mm.

TCM Function (TTL Converted to Manual)

To use TCM, first shoot in ETTL mode. Then, short press the TCM button to transform from ETTL to Manual (M) mode, retaining the flash output. You can then adjust the output manually as needed.

Custom Functions (C.Fn)

Short press the MENU button to enter the main menu display. Use the dial and SET button to navigate and adjust various custom functions, including:

• m/ft: Select meters or feet for distance display.
• AF: Turn AF assist beam ON/OFF.
• STBY: Set standby time (e.g., 60min/30min).
• RX STBY: Set receiver standby time (e.g., 60min/30min).
• SCAN: Scan for clear channels (OFF/START).
• CH: Select channel from 1 to 32.
• ID: Select ID from 01-99 or OFF.
• BEEP: Turn beep sound ON/OFF.
• LIGHT: Adjust LCD backlight duration (12sec/OFF/ON).
• LCD: Adjust LCD contrast (-3 to 3).
• FEB ACL: Turn FEB auto clear ON/OFF.
• TX: Turn flash function of transmitter unit ON/OFF.

Maintenance

• Keep the device dry. Do not handle with wet hands or immerse in water.
• Avoid strong impacts, as this may damage the flash unit.
• Keep the flash unit away from strong magnetic fields.
• Clean the flash unit regularly with a soft, dry cloth. Avoid using solvents or harsh chemicals.
• If the unit will not be used for an extended period, remove the batteries to prevent leakage and corrosion.

Troubleshooting

• Flash not firing: Check battery level, ensure flash is securely mounted on hot shoe, verify wireless settings (channel, ID, group) if using off-camera.
• E1 error: This error typically indicates a need to reboot the flash unit. Turn the flash off and then on again. If the issue persists, check the battery compartment for proper battery insertion or try new batteries.
• Inconsistent exposure: Ensure flash mode (ETTL/M) is appropriate for your shooting conditions. Check FEC settings. For HSS, be aware of potential power loss at very high shutter speeds.
• Screen not lighting up: Check the LCD backlight setting in Custom Functions (C.Fn).

Specifications

Warranty and Support

For warranty information and product support, please refer to the official Godox website or contact EACHSHOT customer service. Protection plans are available for purchase separately to extend coverage beyond the standard manufacturer's warranty.

• 2-Year Protection Plan: Available for $15.99.
• 3-Year Protection Plan: Available for $21.99.
• Complete Protect: Monthly plan for $16.99/month, covers eligible past and future purchases (renews monthly until cancelled).