Dirk Wright schrieb:
>
> As someone else mentioned, can these cameras be modified for rear
> curtain sync?
Yes and no.
> Just to be sure I have this correct, rear curtain sync is when the the
> sync contacts are closed when the trailing curtain begins to move, as
> opposed to the usual X sync which occurs when the leading curtain is
> fully open?
Not triggered by the rear curtain, because this would mean mayor changes
of the camera wiring.
But a long sync time with flash emission and following closing of the
shutter.
> Assuming that the above is correct, I can't think of the difference it
> would have on picture taking. For really slow shutter speeds, the stuff
> illuminated by ambient light would be blurred from movement, and the
> flash illuminated stuff would be sharp. For normal sync, it seems that
> the ambient stuff is recorded after the flash fires. For rear curtain
> sync, the ambient stuff would be recorded before the flash fires. I'm
> not sure what difference this would make. Anyone?
Well to make such photos, first cover the flash-ready-contact on the hot
shoe with some isolating tape. This will insure long sync times.
Then cover the sync contact of the hot shoe with a strip of paper, while
mounting the flash.
Press the trigger. What will happen now?
The camera opens the shutter for an long time exposure (if dark enough).
No flash emission.
When you think the background is well exposed and your object is
perfectly framed, pull the paper strip.
The flash starts and -important- will be TTL controlled by the camera.
When the camera thinks the exposure is well done, it will quench the
flash and imediate close the rear shutter curtain.
Voila, rear shutter sync. Might be usefull for some "creative"
techniques.
Works as well with FP flash.
Regards
Richard
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