mike wilson wrote:
John Sessoms wrote:
The K-10D and K-20D both allow you to set the on-board flash to
trailing curtain sync. How difficult would it be for them to make the
hot-shoe also fire on the trailing curtain when a non-dedicated
"flash" is installed?
E.G. like with a radio-sync transmitter or Vivitar 285HV? Dedicated
flash like the AF-540FGZ has its own circuitry to talk to the camera
and can be set to trailing curtain sync.
Is this something they could do with a firmware update?
Non-dedicated flashes fire when they are told to. It doesn't mstter
whether that is at the beginning, the end or halfway through exposure.
On the face of it, some coding telling the camera to fire any connected
flash at the end of exposure would be a comparatively simple task. So
simple that I must go and see if it will work already....
OK. With KX and AF280T, it's no go. Trailing curtain seems to be a
PTTL-only mode, as the RTF preflashes. Some illogicality there......
There is no trailing curtain mode on the DL2.
Or is it something that would require radical hardware revision?
For that matter what do the dedicated pins on the Pentax shoe tell the
flash? I know what the big one in the center does, and it's obvious
which one is ground.
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