Sylwester wrote: > Maybe they have some real problems with implementing IS in new > lenses/bodies? And that would be OK - IS seems quite complicated to > implement. > For me it is mystery, why Pentax hasn't decided to introduce USM lenses? > After all they have long-term experience in complicated ultrasonic medical > devices and if Sigma can introduce their HSM lenses and bodies (they sell > far worse than even Pentax SLRs) that can use it, then why Pentax couldn't > do the same? That should even be easier to implement than IS - KAF2 bodies > already accept signal from lens (FA* in this case) not to use in-camera AF > motor (when AF/MF clutch on FA* lenses is in "manual focus" position) and > most of them have power zoom contacts, that could provide power to > ultrasonic motor in lens. This is really strange...
Well, they have patented this too :o) The KAF3 mount will cater for both IS and USM. It is probably not a technical decision, more a marketing one. I think Pentax must releases USM lenses because all the competition does soon. Minolta will release their USM lens series this fall. Canon, Nikon and even Sigma already got theirs. Firstly, though. Pentax needs bodies that can take USM lenses and that appeal to likely buyers of such lenses. Pål
