I hadn't looked at the metadata from my A400 in detail until you asked. From a recent shoot with the K-5, it's described as an "A series lens," and the focal length is noted as 400mm. The focal length was apparently derived from the shake reduction setting, because with a couple of shots where I had neglected to change it from an earlier setting of 85mm, the metadata still reads 85mm, rather than 400mm. On both, the data noted when the AF540 flash fired and recorded f stop and shutter speed. As I recall the K-7 performed in the same manner.
Paul On Apr 29, 2011, at 8:05 AM, AlunFoto wrote: > Leon, > I don't have any A lens suitable for testing right now, but I'm a bit > curious. How is the "lens" described in the file metadata? Is there > any difference between K-7 and the older cameras there? > > Jostein > > 2011/4/24 Leon Altoff <leon.alt...@gmail.com>: >> I need to find out more about this, because it doesn't work for me. >> At least, not with the lens I use. >> >> I'll admit it's not your normal A lens, but this set up worked on the >> MZ-S and the *istD and I'd love to have it work on the K7 (or the next >> camera upgrade). I have added A contacts to a set of bellows. With >> the camera set to fully open aperture (f2 in this case), and the lens >> on the bellows closed down when the prefire happens, the camera >> calculates the correct exposure and the flash fires correctly - using >> the *istD and 2 AF360 flashes. The K10D and K7 fire the flash at full >> output. >> >> Both the newer cameras behave as if there is an A lens connected to >> the camera. The camera recognises the aperture range I set the mount >> to and I can select the aperture accordingly. It even meters >> correctly for changes in the aperture set on the camera in P mode. >> Everything except the flash output. >> >> If someone has a simple A lens (maximum of 6 contacts on the lens), a >> K7 and an AF360 flash can you conduct an experiment to see if you get >> correct P-TTL exposure out of the setup? That will at least let me >> know if it's just me or a design issue. I'll have to try high speed >> sync mode to see if that makes a difference since it works for Paul. >> >> Leon >> >> On 18 April 2011 23:26, Paul Stenquist <pnstenqu...@comcast.net> wrote: >>> >>> On Apr 18, 2011, at 9:12 AM, Thibouille wrote: >>> >>>> AFAIK the A lenses do PTTL with K7. >>> >>> And with the K5 as well. I frequently use it with my A400/5.6 in high-speed >>> synch mode. >>> Paul >>> >>> >>>> >>>> 2011/4/18 Leon Altoff <leon.alt...@gmail.com>: >>>>> Hi Tim, >>>>> >>>>> I've considered this same thing, though Pentax normally do manage to >>>>> make a nice improvement between models. Personally I've decided to >>>>> upgrade every second major upgrade - bought a K10D, skipped the K20D, >>>>> bought the K7, skipped the K5, buy the K3?. >>>>> >>>>> I'll admit I'd like the improved low light capability of the K5 over >>>>> the K7, but as I'm expecting the K3 (for want of a better model number >>>>> to apply) to be improved I can wait. For a while. If it's not >>>>> improved then I will probably go out and buy a K5 simply to keep the >>>>> control layout on the back the same between the K5 and the K7 (because >>>>> I do use 2 bodies). >>>>> >>>>> I'm hanging out for some rumors of what the next model holds, but >>>>> there is nothing. And I'm watching other's buying K5's. >>>>> >>>>> What should they be working on? I don't know. I would like to see >>>>> them bring back P-TTL flash working on A lenses like the *istD had. I >>>>> use that. >>>>> >>>>> Leon >> >> -- >> PDML Pentax-Discuss Mail List >> PDML@pdml.net >> http://pdml.net/mailman/listinfo/pdml_pdml.net >> to UNSUBSCRIBE from the PDML, please visit the link directly above and >> follow the directions. >> > > > > -- > http://www.alunfoto.no/galleri/ > http://alunfoto.blogspot.com > > -- > PDML Pentax-Discuss Mail List > PDML@pdml.net > 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 PDML@pdml.net http://pdml.net/mailman/listinfo/pdml_pdml.net to UNSUBSCRIBE from the PDML, please visit the link directly above and follow the directions.
