John Francis wrote: >On Wed, Jan 30, 2008 at 09:04:45AM -0700, Joseph Tainter wrote: >> >> The TC(s) may be rebadged versions of the Kenko 300 TCs--which are >> reported to be excellent. Pentax has said that for them to design TCs >> from scratch in the foreseeable future (2-3 years) they would have to >> remove a lens from the road map. > >I think they'll need to be a little more than that. While they may be >the same optically, they will need some additional Pentax electronics >in order to report the correct focal length to the camera - essential >for in-body shake reduction. Just badge engineering won't be enough.
Some re-engineering will be necessary just to allow for SDM focusing but I think the focal length issue could be handled fairly easily by having the teleconverter manipulate the data going from the lens to the camera. Perhaps it might even be possible to have the lens recognize which TC it's attached to and make its own correction (though this would obviously only apply to new, SDM lenses, which leads to your next point....) >I hope whatever they come up with will also work with screwdriver-AF. I'd like that, too. But I'd be very surprised if it happened. Virtually every new lens planned has "SDM" at the end. Pretty easy to see which way the wind is blowing... -- 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.
