*istD X Sync

[Rick Womer]

Peter,

The ambient light should be contributing almost
nothing to the exposure under these circumstances. The
duration of the flash exposure is 1/1000-1/20,000 sec,
depending upon the exposure.  X synch fires the flash
at the midpoint of the shutter's exposure. So, the
shutter speed should make no difference at all.

Or is there something I am missing too?

Rick

--- Peter Loveday <peter at loveday.org> wrote:

> Am I completely missing something, or is there no
> way to set the *istD to 
> its X Sync speed manually?
> 
> I recall messing with this back when I first got it,
> but didn't really 
> pursue it because the external flash I was using was
> dedicated anyway, so 
> it'd work itself out.
> 
> Now that its become part of my "second kit" since
> the K10D, I'm using an 
> older (PC connection) flash... it all works fine
> (yes, I checked the trigger 
> voltage), I'm using it in M, set the flash and
> camera to the same aperture, 
> but of course I can only set the *istD to 1/125.
> 
> In theory, X Sync is 1/150... but my other options
> (depending on half or 
> third EV setting) are 1/160 or 1/180...
> 
> Am I being thick, or does this seem really silly?
> 
> - Peter
> 
> 
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http://www.photo.net/photos/RickW


 
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