Images removed because they belong to someone else. Please only post links to other peoples images.
As for how to do it, the first image, you would use a longer shutter speed and zoom while taking the picture.
The second picture is called panning. Using a shutter speed around 1/200-1/250 you would follow or track the moving vehicle and as you follow the vehicle (left to right or right to left) you take the shot continuing to follow the vehicle for a moment after you take the photograph.
Nikon D700 l Nikkor 28-70 f2.8 l Nikkor 18-35 f3.5-4.5 l Nikkor 50 f1.8 l Sigma 70-200 f2.8 l
(3x) SB900's & SU800 l Manfrotto Tripod and Head
I don't really understand this process...
The sample shots are what I'm looking for but after reading it, it says you put the "magic arm" on the car you're taking the shot of and roll it and then take the picture...in the sample shots, there is no way that those cars had the "magic arm" attached or you would definitely see it in the picture!
The first one is really cool, not sure how they did it.. I would guess the second one was taken from a second car driving down the road along with the first one. If you are going fast enough you could have a pretty fast shutter speed and you would still get all that motion in the background. I think the key is you need to be going the same speed as the car you are taking a picture of.
...OR you can cheat, as I did. When I took this photo of my wife driving past in her new* truck, I used a fast shutter speed to be sure to capture her face, the new lettering and the cluster of sculptures in the truck (top).
(bottom) A bit of Photoshop Motion Blur on the background and Radial Blur on the wheels adds a sense of immediacy to it and takes out the "parked truck" look. Yes, you have to Select the areas you want to have blurred.