Yes, it works only in p-ttl. Don't know why. Perhaps because high speed synch requires multiple bursts. But it works well. I use it all the time for fill in daylight shooting. Paul On Nov 27, 2009, at 6:34 AM, Peter Loveday wrote:
>> I decided to check out high speed sync with my K20D and AF540. >> Am I missing something or does it only work in p-ttl? It seems that I can >> crank the shutter speed up to 1/4000 with the flash in p-ttl, but in manual >> it stops at 1/180. > > Not really sure, I can't think of any technical reason to disallow it > completely. > > What manual power level are you using? > > Remember HSS loses (a lot) of power, so you'll never be able to get full, and > at high speeds it'll be very low indeed. > > So perhaps try setting 1/16 or something and see if it changes anything. > > - Peter > > > -- > PDML Pentax-Discuss Mail List > [email protected] > http://pdml.net/mailman/listinfo/pdml_pdml.net > to UNSUBSCRIBE from the PDML, please visit the link directly above and follow > the directions. -- PDML Pentax-Discuss Mail List [email protected] http://pdml.net/mailman/listinfo/pdml_pdml.net to UNSUBSCRIBE from the PDML, please visit the link directly above and follow the directions.
