I think it's something in the P-TTL circuits of the camera. It's not
something so simple as a contact that stays closed as long as the
shutter is open.
I think the same pin that was used to communicate with AF-500FTZ & tell
it how long the shutter curtain was open is used for something else on
the P-TTL cameras.
The AF-500FTZ rear curtain sync worked with the *ist-D.
That's how I remember it anyway.
On 12/5/2013 8:16 PM, Bruce Walker wrote:
Zos, you'd think so, but it doesn't seem to do that except in specific
circumstances with specific flashes. I can't get it to work with
simple radio triggers for instance, and I've tried it on both my
K100Ds and K20D. Haven't tried on my K-3, but I wouldn't hold my
breath.
It does work with my AF540FGZ flashes, but only if the flash is in the
hot shoe on the camera, not with the Pentax wireless flash protocol.
It's quite vexing as I really wanted to do light trails stuff on a
number of occasions.
I even tried it with the X-sync socket on the K20D thinking that
they'd treat that as a very simple circuit -- nope!
On Thu, Dec 5, 2013 at 7:41 PM, Zos Xavius <[email protected]> wrote:
The ready light should work. I don't know about anything else.
Shouldn't second curtain just trigger the hotshoe at the end
regardless of flash attached?
On Thu, Dec 5, 2013 at 5:36 PM, Glen Berry <[email protected]> wrote:
I'm strongly considering purchasing a used Pentax AF-500FTZ, mainly for
off-camera "strobist" style shooting. As I understand it, the unit has a
built-in optical slave which should work fine for manual-mode, strobist
style shooting.
I'd also like to us this flash in the hot shoe of my K100D, which only
supports P-TTL mode. I know that I'll have to use the AF-500FTZ in manual
mode to control the exposure. I'm fine with that.
Do any of these other AF-500FTZ features work with K100D:
Focus assist light?
Strobe (multiple burst) mode?
Second-curtain sync?
Ready light in viewfinder?
I appreciate any information you can share about this particular combination
of gear.
Thanks,
Glen
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