Charlton, may I ask whether this happens with all lenses you use? It could be that your lens is defective. Remember, we are talking TTL flash here and whether or not the flash is triggered (and with what 'strength') is determined by the camera during exposure. In other words, the camera checks how much light actually comes through the lens and then starts the flash (or leaves it alone).
Now if your lens diaphragm mechanism is a bit sticky (a common problem with Pentax lenses), it may not be fully closed (to the predetermined value) at the time the exposure begins and the camera may decide not to use the flash at all. This should also lead to some over-exposed frames when not using the flash, depending what apertures and speeds you use. Take off the lens and carefully operate the little lever that operates the diaphragm. The diaphragm must follow the lever action immediately, without the slightest hesitation. Of course this is just one possible reason for your problem, but as it happened to me once and it took me a while to understand it I thought I mention it... Sven ... I have an old model camera, Pentax SF10 w/Sunpak auto 266 D thyristor flash. Now whether that means anything to anyone is my guess (but I'm hoping it does) :) The flash syncing with the shutter is very unpredictable and I'm not sure what to do about it. I have the Pentax manual but it's hardly any help in explaining what I'm doing wrong. It's very frustrating to be taking a shot that needs light, the camera itself says it needs light/flash, but nada! I'm not sure if it has to do with the hotshoe or what. On the bottom of the connection on the flash are five connect points. They seem to be making contact. Any suggestions? Thanks to anyone, Charlton If I had wanted to put up with "high maintenance" I would have married a primadonna with a Harley. www.geocities.com/siarlbychan
