I took K-1 with DA*300 to evening rodeo. Shot in DNG, full frame, omg, it's slow
compare to K5iis burst mode. Lots of out of focus, mostly by me, I guess. I'm not sure that monopod without SR is the best solution, I shot baseball handheld better.
Prime 300mm on FF is still tight there, just like on cropped format, not a big difference, higher ISO however is liberating. I tried to shot with 6400, but also with up to 10000. Not bad.
Focus and speed is biggest issue, rodeo is fast to capture. I definitely better get zoom for that arena, still thinking about buying Tamron 70-200, it would be an ideal focal range there.
For the next rodeo I will test Tamron on K-1. Or maybe on K5.
Anyway, cowgirls (in good focus, and not that perfect)