Nikon Speedlight SB-910's not firing with D810 or D850

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JennaBrownPhotography New Member • Posts: 1
Nikon Speedlight SB-910's not firing with D810 or D850

Hi

I need some support quite urgently. I have 2x SB-910's that have worked like a dream with my D750 and D810 until it recently stopped firing reliably on the D810. Assuming that the D810 maybe just needed a service, and because I always need at least 2 bodies, I purchased the D850 to send the D810 off for repair.

To my surprise, both Speedlights behave exactly the same on my D850. They won't fire in low light conditions, but if I ramp the ISO they will, albeit not reliably. Sometimes it does, sometimes it doesn't.

I am shooting TTL only. I have tried with different lenses and the issue persists.

Any light on this issue (pun) would be greatly appreciated!

Many thanks

Nikon D750 Nikon D810 Nikon D850
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