can you explain this drive-by-shooting ?

[raytoei@gmail.com]

I finally got around to develop this roll of Drive By shooting.
One picture that got me intrigued is the below.
Why are the nearest pedestrian in clear focus versus the distant objects which looked like they blurred by my car movement.

I am sure the aperture is around f11 or f16 and I believed I focused at infinity.

Roll #243 Film is UltraTMAX400 developed in D76, ei800.
M2 with J8 Lens.

 

[tomalophicon]

Maybe as you moved, you moved your camera so it was pointed at them (the same principle as panning to catch a moving object and blur everything else. Even 125th or 250th can get some blur if you're moving fast enough.

 

[sevo]

You panned the main subject (either through a conscious camera movement or accidentally as you drove around he bend), so that the motion blur distributes to back- and foreground with a motionless centre rather than grading from front to back. The small angular swing on the girls and post introduced by the camera motion is below visibility.

 

[oftheherd]

I think it must be you were focused on the curb or the ladies. Without f/16, even your background would have been more blurred. Driving would have created a little blur, but the shutter speed apparently helped there.

 

[tapesonthefloor]

You are most definitely focused on the ladies, and not nearly as much of the background is in a state of motion blur as first appears. Some of the vehicles in the distance are crossing through an intersection to the right, and their motion blur is tricking your mind into seeing that exaggerated motion in all the out-of-focus regions.

For the rest of the OOF areas, sevo's phenomenon is also present: you panned laterally during exposure, proof of which can be seen in the taillights of the waiting SUV in the distance.

 

[raytoei@gmail.com]

Thanks for the reply. I doubt if the first picture is replicable.

This second example is easier to explain.

The relative movement of the bike is less than the car on the opposite direction.

Roll #244 UltrafinePLUS400 in D76 ei400 7.5mins@20
Contax G1 with Biogon Lens

 

[ederek]

Panning, which swings an arc when camera is in motion relative to viewed objects in the scene. Nodal point is in front of camera. Seems to be relatively little vertical panning, mostly horizontal. You can separate panning from DOF affects by comparing horizontal and vertical lines, such as building behind walking girls (which also have motion blur). It is same principle for both images, just different parameters for nodal point and various subjects.

So, did these women have any opportunity to address you and your "street shot"? Or just snipe the shot and move on regardless of what they may think?

 

[arunrajmohan]

Two effects are possible here. One is as suggested by others - panning. You camera is being moved compensating your vehicle movement versus the movement of the stationary object. This is valid if you are moving in a straight line and all the objects move nearly perpendicular to your camera. In this situation closer the object faster it appears to move and blur.

There is a possible second effect, which only the photographer can corroborate. You are moving in a curve and the focal point is stationary. This is when objects farther away will move faster and blur. Objects at the focal point will not blur. Objects closer than the focal point will also blur.

Hope I am not confusing.
Arun

 

[silverbullet]

Here is a pic with a very special effect: the long leg
Cameraswing to get the taxi sharp and a dude running into the same direction....

Never to get the same effect........ :-( twice

http://www.flickr.com/photos/36573929@N00/168436528/

 

[raytoei@gmail.com]

Guys, thanks for the comments. Interesting effect. Perhaps, rather than p&s during traffic lights as I do most of the time, I should try panning when the vehicle is moving.

raytoei