Yea, focusing is another tough thing, my lenses are considered pretty quick but its still tough. Ive been focusing in the general area that i plan on taking the picture, so its close. Then i take the shot of the car. It seems to have been working for me.
Ive seen some people use flash also, i might try this and see what the results are. Haha i can setup a speedlite off camera and try some cool stuff too. I dont know.
Feel free to CC (constructive critique) my photos.
Here's a few of my fav's: (dont mind the watermark)
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