Godox Wireless Trigger X-Pro P (Pentax)

Started Oct 13, 2018 | Discussions thread
kli
kli Veteran Member • Posts: 3,591
Re: Godox Wireless Trigger X-Pro P (Pentax)

Adam007 wrote:

Can anyone explain why the strobes need to be TTL?

Because TTL requires two-way communication between the camera and the flash. The camera has to be able to tell the flash to set a known power level and give a preflash to meter and to meter at the moment the flash goes off, and then to adjust the power on the flash based on the metering results and FEC settings.

If the strobe can't receive/send and act on the preflash/power adjustment commands, then TTL won't work.

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