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Manual Godox TT685s (Sony) Flash

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Manual

The flash output is adjustable from 1/1 full power to 1/128th power

in 1/3rd stop increments. To obtain a correct flash exposure, use a

hand-held flash meter to determine the required flash output.

M: Manual Flash

- 37 - - 38 -

Press < MODE > button so

1 that < M > is displayed.

Turn the Select Dial to choose

2 a desired flash output amount.

Press < SET > button again to

3 confirm the setting.

Figures displayed when reducing flash output level→

←Figures displayed when increasing flash output level

1/41/21/1

1/1-0.3

1/2+0.7

1/1-0.7

1/2+0.3

1/2-0.3

1/4+0.7

1/2-0.7

1/4+0.3

······

Flash Output Range

The following table makes it easier to see how the stop changes in

terms of f/stop when you increase or decrease the flash output. For

example, when you decrease the flash output to 1/2, 1/2-0.3, or 1/2-

0.7, and then increase the flash output to more than 1/2, 1/2+0.3,

1/2+0.7, and 1/1 will be displayed.

Optical S1 Secondary Unit Setting

In M manual flash mode, press <S1/S2> button so that this flash can

function as an optic S1 secondary flash with optic sensor. With this

function, the flash will fire synchronously when the main flash fires,

the same effect as that by the use of radio triggers. This helps create

multiple lighting effects.

Optical S2 Secondary Unit Setting

Press <S1/S2> button so that this flash can also function as an optic

S2 secondary flash with optic 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.

Manual Off Camera High-speed Setting

In M manual flash mode, press < > button to select high-speed

mode and is displayed.

Set the flash frequency and

3 flash times.

● Press Function Button 3

< > to select the flash

times. Turn the Select Dial to

set the number.

● Press Function Button 4

< > to select the flash

frequency. Turn the Select

Dial to set the number.

● After you finish the setting,

press <SET> button and all

the settings will be displayed.

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.

Press <MODE> button so

1 that < > is displayed.

Turn the Select Dial to choose

2 a desired flash output.

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.

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.

Number of Flashes / Flash Frequency = Shutter Speed

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 camera 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.

MULTI

SYNC

MULTI

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Specifications

Brand	Godox
Model	TT685s (Sony)
Category	Flashes
File type	PDF
File size	7.95 MB

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What is the guide number? Verified

The guide number indicates the maximum amount of flash light that the flash can produce. A higher number means that the subject can be illuminated from a greater distance.

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