Hi Leon My experience with wireless flash is not with Pentax, but rather with Minolta. So you will have to decide whether my comments have any bearing on your situation. As I understand it the operation of the wireless is similiar. The communications involves your onboard flash having to flash at least twice. Once to start and another for the all stop with full TTL flash capability. The flash is not supposed to be a significant amount as to affect exposures as your manual also says. Minolta also has a ratio setting that allows the onboard flash to provide 1/3 of the required flash and the other external flash provides the rest. My gut feeling here is that you would be able to see a reflection in a mirror or a window even though you wouldn't see it in the exposure. I know you can see it with your eyes when it goes off. What I mean by this is suppose you plan to do a portrait of a person with the wireless external flash placed off to the side of a person with no reflectors to thus create a dark shadow side of the person even though the onboard flash would be aimed directly at the persons face. If the shadows occur in the proper place and exposure is correct your equipment is working correctly. I would make some more tests without mirrors or windows entering into the formula. If you get satisfactory results I think there is most likely nothing wrong with your equipment.
Cheers Taz > Hi, > > I'm after a bit of clarification as to how Pentax Function 10 works on > the MZ-S, before I send mine off for repair. > > PF 10 controls how the popup flash will behave when used in wireless > mode. The manual says: > ++ > During wireless operation you can set the built in flash to function as > a flash or wireless controller. > Pentax Function No 10 > Setting No > [1] Sets the built in flash to operate as a flash. > [2] Sets the built in flash to operate as a wireless flash controller. > > Memo > If the built in flash is used as a wireless flash controller, the > preflash emitted by the built in flash unit does not affect the > exposure, only to transmit the exposure information to the wireless > flash. > ++ > > The problem is that I am getting reflections from the the popup flash > when I have PF 10 set to 2, and I don't think this should be happening > (and I know for sure the reflections are from the built in flash > because I have one slide with a perfect reflection of 3 flashes > reflected in the glass). For those who have played with wireless flash > please let me know what you think. > > > Leon >
