Originally posted by Larrymc Yes there certainly was a thread several months back. My K-3 has no lag between shutter button press (I use back button focus) and flash firing with either my Sigma EF 610 DG Super or the built in flash using the P-TTL system. I just rechecked it this mornng after reading this thread.....nope still no lag. In that 16 page thread I can't remember seeing any post that offered instrumented proof of an actual lag on all K-3s and without instrumentation I don't see how in the heck anyone can quantify a certain amount of time lag for flash firing like 2 or 3 tenths of a second. Suffice it to say that not all K-3s have a lag problem with their P-TTL flash system.
See the post from Frank the Matt on page 14. I have also posted images of myself in a mirror where I raised my index finger to vertical off the shutter release by the time the shot is taken. I can easily do this with P-TTL, but not when the flash is in manual. The delay happens both with the built-in flash and with my Metz 52.
Of course I can't prove that this afflicts "all K-3s", as I don't have access to all K-3s. It affects mine and those of many others. At least one poster to the thread says he returned his K3 because of this problem and tried another one in the shop, but it was the same.