Question for Jeff Foster and Dave Kommel

[Toby Lang]

Originally Posted by Dave Kommel

Modern DSLR's do not use infared for focusing.

Do all photographers at the track use modern DSLRs?

And what about external flashes? How long of a delay is there after pressing the shutter and the flashes going off? Is this delay adjustable?

It's possible to have the internal flash off and still be sending a signal to the external flashes, right?