Pre-flash on Godox tt350

Pietrach · 8 Dec 2019

Hi
I would expect the Manual mode on this flash to not have the pre-flash, but it does happen on mine.
I set the mode to M, set the power output, and when i take an image it releases a series of pre-flashes as if it was a ttl mode.
Any idea how to disable this?

Phil V · 8 Dec 2019

Don't have mine to hand - but is there a chance it's because you have it on Master mode?
On wireless modes the flash might pre-flash as communication with slaves.

Pietrach · 8 Dec 2019

I will try this and report the outcome. What mode I should be to act an a simple on camera manual flash, without a pre-flash?

HoppyUK · 8 Dec 2019

Pietrach said:
I will try this and report the outcome. What mode I should be to act an a simple on camera manual flash, without a pre-flash?

Not familiar with that particular model but in general the pre-flash, or more correctly multiple pre-flashes, are used to a) calculate exposure in TTL mode, and b) send control signals to other remote flash units in optical Master mode.

Pietrach · 8 Dec 2019

HoppyUK said:
Not familiar with that particular model but in general the pre-flash, or more correctly multiple pre-flashes, are used to a) calculate exposure in TTL mode, and b) send control signals to other remote flash units in optical Master mode.

Thank you, but what is the mode i can expect to have no pre-flash in?

Pietrach · 8 Dec 2019

Ok found.it, thanks
Set it to back curtain instead of fill flash within the camera settings.
Thanks all for help.

Snapsh0t · 10 Dec 2019

Phil V said:
Don't have mine to hand - but is there a chance it's because you have it on Master mode?
On wireless modes the flash might pre-flash as communication with slaves.

No, it doesn't. The TT350 only uses 2.4GHz radio when in Master mode.

HoppyUK said:
Not familiar with that particular model but in general the pre-flash, or more correctly multiple pre-flashes, are used to a) calculate exposure in TTL mode, and b) send control signals to other remote flash units in optical Master mode.

The TT350 doesn't have optical Master mode.

cmcm789 · 10 Dec 2019

My 270EX used to send out a few pre flashes, if i recall correctly this was because the camera was using the flash to achieve auto focus (Af Assist?) as the camera or flash didn't have the infrared (i think) light to do this in low light.

This was a while ago so my memory is fuzzy, but i'm sure it stopped when i disabled that setting. I have a tt350 now and haven't noticed this happening (used on camera with no other flashes).