Not really, there's no reason, outside of deliberate prevention, to keep
TTL from working with any lens, on a camera that supports it. The major
problem might be that you're outside of the effective range for the
flash output / sensor(or film for that matter) sensitivity. But that
just assumes the photographer has some idea of what he is doing.
Cory Papenfuss wrote:
> A friend of mine with a *ist-DL just bought a cheepie TTL flash
> and was surprised to discover that it didn't work. I seemed to recall
> that was one of the neuterings that Pentax did between the DS and the DL
> (removed TTL flash). Sure enough, it seemed to work fine on my -DS...
> even with an pre-A lens!
>
> So, upon checking the respective camera manuals (pp 177 on the -DS
> and 178 on the -DL), the table agreed. One thing I found strange
> though... P-TTL alegedly *doesn't* work with an A lens on a -DS but does
> on a -DL. Can anyone verify this? What about with a pre-A lens? It
> seems weird to me that it *would* work on a -DS but would on a -DL.
>
> If that's the case, if I were looking to get a more automatic
> flash than the three Vivitar 285's I've got, I should probably get a TTL
> instead of a P-TTL. What are the drawbacks to that?
>
> Thanks,
> -Cory
>
>
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