Very interesting stuff, John. Thanks. I'll keep the subject posted with anything new I can get.
2010/11/1 John Sessoms <[email protected]>: > From: Thibouille >> >> Thanks John. >> It behaves like I thought it would. What I thought about is the following: >> Use a non P-TTL flash as a 240FT set to 2nd curtain. It should flash only >> once. >> Find a way to make it of no use to the exposure but use it to trigger >> other flashes with optical sensor. >> >> In theory, it should work. But I won't know before I grab my hands on >> the flashes.... > > Just a quick test now with the K10D set to rear curtain sync & AF280T on the > hot-shoe, the flash fires with the front curtain, and no second flash. > > I'll have to try it with the X-sync (PC) terminal on the K20 later. I'm > "home" for a quick lunch & I left the K20 locked in the car. > > The way it seems to work with the AF360FGZ and AF540FGZ (and the AF500FTZ > for that matter) is they all get the rear curtain sync information through > one of the dedicated pins. > > Basically it appears the firing circuit closes with the front curtain and > stays closed until the rear curtain gets ready to move. > > I think you'll need something like this to get rear curtain sync to work > with non-dedicated flash: > > http://people.rit.edu/andpph/text-tailflash.html > > I haven't read it through yet, but it might also supress the pre-flash. > > -- > 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. > -- Thibault Massart aka Thibouille/Thibs ---------------------- Photo: K-7, Sigma 28/1.8 macro, FA50/1.4, DA40Ltd, K30/2.8, DA16-45, DA50-135, DA50-200, 360FGZ ... Laptop: Macbook 13" Unibody SnowLeo/Win7 Programing: Delphi 2009 -- 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.
