Ok so we all know sync speeds are typically 1/250th, well Ive found out that this isn't always fast enough to keep skiers sharp, regardless of the power output. Depending on the trick, the skiers can be blurry and Im not sure how to fix it. I know with the D7000 with off camera flash you can sometimes pick up 1/320th, and sometimes only half the frame is lit, Ive shot this way some, but its not perfect. Is there anything I can do?