V860II-S + A7R IV limitation?

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Alwajeeh Forum Member • Posts: 57
V860II-S + A7R IV limitation?

I own 2 Godox V860II-S and been using them without issues with my older A-mount cameras. I've recently mounted the flash on my Sony A7R IV and encountered these limitations:

1- Instead of 5, the flash has only 2 operation modes when mounted (optical master and optical slave). The other 3 modes (radio master, radio slave and the normal TTL/M) are not available anymore. They come back by turning off the camera or unmounting the flash.

2- The rear sync option is turned off (grayed-out on the camera) and the camera asks me to use a compatible flash. Turning off or unmounting the flash, the option becomes available again.

Both limitations disappeared when mounting the flash atop older cameras (e.g. A99-II)

Updating the flash's firmware to the latest version (1.7) did not help.

Any one has an idea or suggestions?

Thanks a lot guys.

 Alwajeeh's gear list:Alwajeeh's gear list
Sony a99 II Sony 16-35mm F2.8 ZA SSM Carl Zeiss Vario-Sonnar T* Sony 70-400mm F4-5.6 G SSM II Sony RX100 II Sony Alpha a99 +8 more
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Sony a7R IV
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