My testing with Ds and 540FGZ flash just to check how it must work, Ds do not have trailing curtain sync with internal flash but support this mode with external. Flash set to trailing curtain mode, Ds in manual mode with shutter set to 1.6 sec., 2 sec. mirror lock-up to clearly evaluate P-TTL preflash. Lenses A50/1.7 with aperture ring in A, DA18-55, FA80-320 with aperture ring in A. P-TTL: preflash, discharge at trailing curtain. A (metering with flash own sensor): discharge at leading curtain.(as expected, flash manual clearly said that trailing curtain mode is not compatible with flash A-metering mode). M on flash: preflash (why???), discharge at trailing curtain. --- Lenses FA80-320 with aperture ring NOT in A, M42 with M42-K adapter. TTL (K10D do not have this mode): discharge at trailing curtain. A: discharge at leading curtain. M on flash: discharge at trailing curtain (without a preflash).
Old lenses (K/M/aperture ring not in A) is not really compatible with K10D/Ds internal flash at all: The built-in flash fully discharges for lenses without a function to set aperture lens ring to A (Auto). And, of course, new fw is 1.10 not 1.01, my typo. On 2/8/07, Basil Vizgin <[EMAIL PROTECTED]> wrote: > I got a reports from different peoples that K10D trailing curtain > behaviour with internal flash is broken after upgrade to fw. 1.01. > > As I understand, the correct behaviour of trailing curtain mode is to > produce a P-TTL preflash, than open a shutter and make a flash > immediately before closing the shutter curtain. > > But with new fw. behaviour is completely different: preflash, than > flash on leading curtain (!), than (if flash not fully discharged on > leading flash, i.e. still have charge/capacity) flash on trailing > curtain. Naturally, we got a multiexposure... > Tests have been taken at shutter speed near 1 sec with DA lenses. > Can anybody confirm this bug or test trailing curtain behaviour on original > fw? > -- PDML Pentax-Discuss Mail List PDML@pdml.net http://pdml.net/mailman/listinfo/pdml_pdml.net
