Minolta lenses with short focus throws

My primary photographic subject is a small child, which makes quick focus more important to me than a supremely accurate one. I've been shooting with an Olympus 35 rc quite a bit the last few months, and one of the things I appreciate about it is how short the focus throw is: probably 90 degrees or thereabouts? My current Minolta lenses, otoh, require more turning than I can do in one wrist flick, which turns focusing from a quarter-second operation to a several-second one.

Any of SR/MC/MD are fine. I'm most interested in normal lenses, but for the sake of discussion I think any focal lengths are interesting.

The new MD / MDIII lenses. IIRC the 50s don't differ much from the older ones, but the wides have VERY short focus throw. In fact I find them much too short.