Flashpoint 400pro misfiring and overexposing in TTL

Started 2 months ago | Discussions
Derek 1906 New Member • Posts: 21
Flashpoint 400pro misfiring and overexposing in TTL

Hello,

Im new to monolights, as I've been using speedlights until this month (thank you black Friday).  Anyway, I have two XPLOR 400 pros inside modifiers, being triggered with R2 Pro Mk II.

So far, about 20% of the time, the lights don't fire when I take a photo.  Im assuming its something with the trigger, since it affects both lights, as well as the speedlight I have on the R2 receiver to light the background.  I've tried using alkaline batteries as well as increasing the channel to a high number, with no luck, still about 1 and 5 doesn't work.

Also, when using TTL, it has been massively overexposing.  I've been able to compensate by using -2.3 exposure correction on my camera, but it still seems odd since its not something I had to do with speedlights.

Since this is my first foray into monolights, is this typical behavior, or is there something I'm doing wrong and could hopefully correct.

Thank you!

Derek

tugwilson Senior Member • Posts: 1,879
Re: Flashpoint 400pro misfiring and overexposing in TTL

Derek 1906 wrote:

Hello,

Im new to monolights, as I've been using speedlights until this month (thank you black Friday). Anyway, I have two XPLOR 400 pros inside modifiers, being triggered with R2 Pro Mk II.

So far, about 20% of the time, the lights don't fire when I take a photo. Im assuming its something with the trigger, since it affects both lights, as well as the speedlight I have on the R2 receiver to light the background. I've tried using alkaline batteries as well as increasing the channel to a high number, with no luck, still about 1 and 5 doesn't work.

You could try setting wireless ID but you may just have a faulty trigger. If you fire using the test button does it misfire?

Also, when using TTL, it has been massively overexposing. I've been able to compensate by using -2.3 exposure correction on my camera, but it still seems odd since its not something I had to do with speedlights.

Check the setting of TTL FEC on the AD400Pros (P 33 of the manual) that should be 0.

Since this is my first foray into monolights, is this typical behavior, or is there something I'm doing wrong and could hopefully correct.

Thank you!

Derek

Chris Dodkin
Chris Dodkin Forum Pro • Posts: 12,023
Re: Flashpoint 400pro misfiring and overexposing in TTL
1

Did you set the trigger to the short range option, i.e. lower power?

Typically they are set to the long range option, with a higher power radio output, which swamps the receivers at close range causing misfires.

Do you have a WiFi scanner on your laptop? Use it to see which channels are occupied and which are free. Use a free or less contested channel for the Godox.

Set ID number on the trigger and flashes.

Only use regular AA batteries, not rechargeables.

For TTL - which camera are you using it with?

Are you using preflash to meter the TTL for the camera, or are you using the previous full exposure? These are the typical options.

What's your subject look like for TTL? If there's a lot of black/dark colors, it may be fooling the TTL to over exposure - maybe post some examples.

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