D300 built-in flash, Part 1: Blinding speed

Started Dec 25, 2008 | Discussions thread
OP Marianne Oelund Veteran Member • Posts: 7,121
SB800 traces
1

These were taken with the same setup as yesterday, except I've increased the photo-transistor loading to square up the falling edges a bit.

As before, Chan. 1 and 2 are the lower-edge and upper-edge phototransistors and chan. 3 is the SB800 flash pulse. Added is chan. 4 which is the PC sync signal. When using the SB800, there is a 10us delay from the PC sync start edge to the flash trigger pulse. Time base is again 1ms/div, for 10ms across the full screen width.
At 1/250sec shutter speed:

At 1/320sec shutter speed:

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MOD TOF guy
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