Those are looking great Aaron, the only real thing wrong with them is something you cant directly change and thats the light. Ideally you would of wanted slightly softer light by taking these at a later time of day so the shadows are less harsh but thats no always possible.
The pre-focusing is all about timing, it takes a long time to really drill it in, basically you have to do it instinctively and even then its quite hit and miss at time's, you will find yourself getting lots of shots with sharp rear wings. I normally figure out the distance that a car will travel from when tell myself the press the shutter till there is a picture taken then focus infront of the point i want to take the picture. I see the car hit the the marker (can be very hard on some surfaces, indoors I use the lines marking different courts, outside i use different shades of stuff.) take the picture and the little time delay inbetween gives the car time to drive into the 'in focus' area.
The size of the gap changes with car speed, focal distance, angle so it generally is just a matter of try it and adjust focus from there.
|