I did get out and shoot more bike racing on the ice after I posted last. Again, I used a K300/4 on my K5. This was the season finale....the NY State Ice Racing Championships which took place over two days on Lake George. There were also Quad and Sidecar events. I'm going by memory with the aperture but I'm pretty sure I stayed with f/11 through the day. It helps having a little more DOF and I don't have to fiddle with the focus as much.
Here's some Sidecars. These guys are a little extreme.
And some Quads. The Quads get really crazy, racing close together and nearly blind if you aren't in the front. I hope this shot captures some of that.
The whole album is here if anyone wants to view it all.
https://plus.google.com/photos/118005862460319379444/albums/5980850388910196497