reply to post by elevenaugust
I agree with _BoneZ_ , if they were outside the vehicle in the sky they would be effected by the motion of the vehicle and blurred like the other
objects , lampposts , trees etc
Well, I wouldn't be so sure about that.
You also have to take into account the distance of the photographed object and the movement (if there's one) of the camera itself. Then, for example
and for a given exposure time/shutter speed, the more far away the object is, the less it is affected by motion blur, especially when the shoot is
done with a short exposure time on a fixed camera (the movement of the camera itself during the exposure time possibly add to the motion blur).
In this case, the motion blur is essentially caused by the relative movement and speed of the car, comparatively to the more or less distant objects
of the scene.
In this example, the rightmost and closest building shows a motion blur effect meaning that not only the taxi is moving, but the photographer as
The leftmost buildings shows moderate motion blur while the more distant building shows no motion blur at all.
It also depends (while I guess that it is not the case here due to the distance of the objects; in the hypothesis of course that they are really
distant) of the relative speed of each involved objects in the scene. Then, a photographer in a car that moves at the same speed alongside of a biker
will obtain this in its shoot:
... with a background landscape affected by a strong motion blur.
So, my guess here is that it possibly can be some distant objects, BTW the more distant tree (in pic 2, at the streetlight position) is not that
blurry, and at least no more blurry than the objects.
And this, especially when you think (in the hypothesis of some dirts on the windows) of the short distance between the camera and the windows.
IMO, it very difficult (but not impossible) to have some focused spots on the windows with no focus blur of the distant landscape, i-e a huge depth of
field with a very short focal length; likely with a cellphone camera anyway.
It will mainly depends of the distance between the window and the camera and the camera model. Unfortunately, we don't know the camera model that was
used, some tests could have been done though.