On Wed, 22 Apr 1998 08:49:41 -0500, "Ken Norton" <image66@xxxxxxx>
wrote:
>>We're all trying to think about this too hard.
>>
>> The easiest way would be to build an external
>>sync-delay circuit, so that the flash is triggered
>>some time _after_ the on-camera sync pulse.
>>
>> Then you just dial in the delay you need
>>(1/60, 1/30, 1/15 etc.) depending on the
>>selected shutter speed.
>>
>> Of course, this wouldn't work in auto mode,
>>but what do you want for a few bucks?
>>(and besides, it would work on all your
>>cameras)
>
>
>Now you are talkin! I seem to recall that this has been the technology used
>long before the IS-1/G40 or the Nikon N90s came out. Oh, and why wouldn't
>it work in auto mode? The beauty of OTF is that the camera will close the
>shutter when enough light has reflected off the film.
>
>Ken N.
>
You are right, Ken.
This is how you even can make multi-flash exposures, with the last of
the flashes 'syncing' (i.e. closing) the rear curtain.
Imagine a large and very dark place (e.g. cathedral), camera on a
tripod in auto-position, small aperture. Press the shutter button
(first curtain opens) and start walking around with your flashgun.
Fire a flash here and there, and when the camera has got enough light
in total (the meter is integrating) the shutter closes. You could even
picture one person in two positions in the same frame this way...
Frank.
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