Originally posted by Adam The problem is that incorporating these features (with current tech) would increase the size of the limiteds, which goes against the design philosophy. They'd have to miniaturize the AF motors and redesign the barrels, which might be a more substantial undertaking.
The DA Limited Zoom is weather resistant and has a "DC motor".
You can compare it with its FF optical predecessor, the FA 20-35 zoom,
which has the same old non-quick-shift screw drive as the FA Limiteds.
The DA Ltd. Zoom is 71 x 68.5mm and weighs 283 gm.
The FA 20-35 is 68 x 70 mm and weighs 245 gm.
The DA Ltd. Zoom gains a little compactness from only having to cover APS-C,
but the bloat caused by the WR and DC technologies is not that bad.