Re: istDS v istDS2

[Godfrey DiGiorgi]

I think you are describing the QuickShift feature of the DA and D-FA  
lenses, Patrice. Has nothing to do with the DS2. DA lenses on the DS  
and D act the same way. It usually does NOT work in AF-Continuous  
mode, however, as the body/lens is supposed to be focusing  
continuously. It's designed to work in AF-Single Shot mode ... lock  
in the focus on the half press, fine-tune focus with the focus ring.

Canon's USM lenses have this feature and call it "full time manual  
focus". It's an excellent feature.

Godfrey