Originally posted by Wheatfield .......... but when it was time for the bride's dad to the hand off to the groom the camera decided that it didn't want to take a picture. The damned AF indicator was lit, but the camera refused to fire.
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I think there is something else other than AF at work here, if the Red AF indicator had come on.
The K-7 has no shutter lag worth talking about, once the AF has locked in.
Imaging Resources put the K-7's in-focus shutter lag (from half-press shutter to action) at 0.074 seconds.
I assume you had flash "On". Did you have Red-Eye reduction turned ON ? The shutter will not be released until the Red-Eye function has completed its double-pre-flash cycle.
The P-TTL pre-flash itself introduces a slight delay, but hardly noticeable. If Zero-Pre-Flash delay is very important, I just shoot in Auto Flash mode.