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I apologize my ignorance on the subject, I am a newbie and hence, ran into this problem.

My set up:

  • Nikon D90
  • Nikon SB700 flash
  • PocketWizard MiniTTL was mounted on my camera for remote triggering and SB700 was mounted on the PocketWizard FlexTTL5.
  • Flash was set for TTL.
  • The flash was 4-ft away from the subject

When I increased the power of the flash beyond 1.3, the photo was totally black. I could see the subject pictured properly only when the flash was below 1.3.

I tried the same set up with my friend's D800E and ran into same issue.

Appreciate if someone could help me understand what is going on.

Thanks, NN

  • May i ask what the shutter speed is on this setup? – Yao Bo Lu Apr 28 '14 at 6:08
  • What exposure mode were you using? What were the following parameters for both the shots that turned out dark and the ones where the subject was properly exposed: shutter speed and aperture? What lens were you using? At what focal length? – Michael C Apr 28 '14 at 6:51
  • I was trying with following configuration: Lens: Nikkor 70-200 f/4, focal length: 70mm, f-stop: 4, shutter speed: 1/250, ISO: 800, metering mode: Spot. Same configuration was used for both D90 and D800E. I turned on Auto-FP feature ON. Please let us know if any more details are needed. – Niranjan Apr 28 '14 at 7:23
  • My apologies for missing the info; I was using Manual mode. – Niranjan Apr 28 '14 at 7:38
  • 2
    I think the problem is the 1/250 at least on d90, since the max sync speed on it is 1/200 i think. I don't think Auto-FP works on remote flash using FlexTTL. – Yao Bo Lu Apr 28 '14 at 10:47
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I checked my PocketWizard FlexTTL5 and MiniTTL manuals and literally I did not find anything. But when I checked these devices by connecting them to PocketWizard Utility software, there was one configuration which was not matching and to my suspect that was the culprit. For FlexTTL5, the HSS was configured to have 1/250th whereas MiniTTL had that 1/320th. This might have caused flash to sync improperly, thus, resulting in underexposed photos. I have attached an image for that configuration screen (in PocketWizard utility software).

Anyways, it was me who was the culprit to configure HSS wrongly (although I do not remember, no one else uses my camera equipments). My apologies if I have wasted anyone's valuable time.

enter image description here

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