Ah...

Thanks, so there at least two options..  Use a TTL-only capable flash
(on camera, works fine), or use a F/FA lense with the aperture ring
turned off).

Fortunately, a 28 mm lens is equivalent to a 42 mm lens on the *istDS,
so my smallest F/FA lens will be suitable for studio work - which will
force me to think about aperture and shutter speed :).

Regards,

Matthew

Alin Flaider wrote:
Matthew,
It seems the only way to force TTL (single flash burst) over P-TTL
is to use K/M lenses or to set the aperture fom aperture ring on
FA/F/A lenses.
Servus, Alin


Matthew wrote:

MT> After some more researching, I think I can restate my problem more clearly.

MT> I want to use my AF-500FTZ off-camera in slave mode.  As a consequence,
MT> I need to be able to disable the P-TTL or at least split the operation
MT> into a pre-flash, a delay and then the main flash.

MT> It looks like TTL becomes the operating mode if the flash is on the
MT> camera (the 500FTZ doesn't support P-TTL), so everything work well there.

MT> I can see that the option that I may need to go down is using a hot-shoe
MT> sync cord to connect to the flash off-camera, which will then drop down
MT> to the lowest common denominator of TTL.

MT> Any advice appreciated.






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