Adam, I think the F lenses do as well. I remember using my SFX with the SMC-F 70-120 and the camera changed its settings (I think it was a program bias of some sort) when zooming the lens. So distance was definitely reported, so was focal length.
According to KMP: http://kmp.bdimitrov.de/technology/summary/index.html 2011/4/13 Adam Maas <[email protected]>: > On Tue, Apr 12, 2011 at 6:58 AM, Boris Liberman <[email protected]> wrote: >> On 4/12/2011 13:49, Paul Stenquist wrote: >>> >>> Hi Jostein, P-TTL works with my K-5 when using the manual focus >>> A400/5.6. The same was true with my K10, K20, and K-7. However, P-TTL >>> doesn't work with my K lenses. I think autoexposure is the key here. >>> Paul >> >> Paul, can it be that with A-lenses P-TTL works in reduced functionality >> mode? I am asking because it is my understanding that P-TTL uses distance to >> object (reported by AF lenses) for its processing. >> >> Boris > > P-TTL uses preflash with A and later lenses for TTL calculations. It > can use distance reporting on FA and later lenses to improve the > calculation for direct flash (not bounce) but that ability is not > required and is in fact not supported by all AF lenses, only FA and > later. > > -- > M. Adam Maas > http://www.mawz.ca > Explorations of the City Around Us. > > -- > 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 KX, MX, SuperA+Motor, Z1, P30 Mamiya C330+80/2.8 Sekonic L-208 FalconEyes TE300D x2 Studio flashes 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.
