[scoundrel1728]

Sample of image with motion blur. In this instance, general direction of camera motion is along diagonal running from lower left to upper right. This is a particularly bad instance and I would normally discard an image of this quality if I had anything better, but I forgot to cull this particular image. Full image (D0437s) shows that the background as well as the subject is blurred by about the same amount. Although this is California, no earthquake in progress at the time and the walls and the pulpit weren't moving. The crop (D0437ks) shows this blur in more detail. The curlicue traces of the specular highlights on the eyeglasses trace the actual path of combined relative motion of both camera and subject. The microphone stand coming into the cropped image from the lower left is fairly parallel with the direction of motion and is rendered relatively sharp, while the one coming from lower right is across the direction of motion and is thus very blurred. The area of the eyeglass frames at about 5 o'clock are also rendered fairly sharp, while the other parts of the frames are blurred.

If this were defocusing blur, the specular highlights would be round or polygonal instead of this curlicue shape and the general directional quality of the blur would be absent or nearly so.