On 12/12/06, Kostas Kavoussanakis <[EMAIL PROTECTED]> wrote: > On Tue, 12 Dec 2006, David Savage wrote: > > > On 12/12/06, Patrick Genovese <[EMAIL PROTECTED]> wrote: > >> I've never used P-TTL so please be kind to me and forgive my ignorance > >> on the subject. > >> > >> The literature seems to suggest that to do wireless P-TTL you need a > >> flash unit acting as a controller and a slave unit to provide the > >> illumination. Does this mean that the controller does not / can not > >> be setup to provide some of the illumination ? > > > > Yes. > > > > As an example with the *istD using the on board flash as the > > controller, I've taken shots before the slave unit (AF-540 FGZ) had > > charged and all I ended up with was a black frame. > > I can't be arsed to check the digis/FGZ flashes manual because I have > neither, but in the MZ-S you set function 10 as required and the > built-in flash may affect the exposure. IOW, you may want to check the > manuals.
OK I just checked. I was wrong. It does use both on board flash & accessory flash when the hot shoe mounted unit is set to Contrast Control Sync. Here's the contrast control sync description from the manual: "Contrast Control Sync Mode. This sync mode enables you to photograph with multiple flash units, utilizing the difference of the light intensity of each flash unit. The ratio of flash light intensity between the flash unit set to this sync mode and the other flash unit is 2:1." The problem with using the on board flash of the D in conjunction with the AF-540 FGZ is that the flash won't fully pop up if 540's mount clamp is tightened. It mentions this elsewhere and recommends using the hot shoe adapter FG. Cheers, Dave -- PDML Pentax-Discuss Mail List [email protected] http://pdml.net/mailman/listinfo/pdml_pdml.net
