This is a technique I learned in class and have been practicing. I know, I know, I need lots more practice! Also, you would not believe how many shots I took today trying to do this. You can do this with zoom lenses that have a manual zoom ring. The trick is to zoom the lens while the shutter is open with a slow shutter speed, usually below 1/60th of a second.
Here are the steps:
1. Focus on your subject.
2. Use a slower shutter speed in either Shutter Priority or Manual Shooting mode. Shutter speeds can range from 1/60 to 1/8.
3. Click the shutter release button and twist to zoom the lens simultaneously.
You can zoom from the shortest to the longest focal length or vice-versa. Using a tripod is suggested.
Now I have to figure out what subjects are best for this technique and just keep practicing. Any suggestions are welcomed!
My settings for the car shot:
Exposure Program: Shutter Priority
Shutter Speed: 1/10 sec
Aperture Value: f/36
Focal Length : 55m