You are partially correct. The blurs would be behind the apparent direction of movement of the object *within the frame*, not necessarily behind the actual direction of movement of the object with respect to the viewer.
For example, if the car travels at 50 mph, and I pan with the direction of travel of the car, but faster than the car is moving, the car appears to be moving backwards within the frame. If I use leading curtain sync while doing this, the trails from the car's lights will appear to be BEHIND the car. if I use trailing curtain sync in this same experiment, the trails will be IN FRONT OF the car. If, OTOH, the car is moving at 50mph, but I am panning more slowly than the car is moving, leading curtain sync will give trails IN FRONT OF the car (as we normally expect from leading curtain sync), because the apparent motion of the car within the frame is forwards. If I use trailing curtain sync, the trails, also as expected, will be IN FRONT OF the car. You can do the same thing with a stationary object. Pan to the left, the apparent motion of the object within the frame is to the right, and leading curtain sync gives a trail to the right with a clear image to the left. Use trariling urtain sync, and the clear image is on the right, with a trail to the left. Absolute motion is irrelevant - it's the motion of the object within the film frame that matters. > -----Original Message----- > From: Christian Skofteland [mailto:[EMAIL PROTECTED] > Sent: 2-Jan-04 17:40 > To: [EMAIL PROTECTED] > Subject: Re: OT: why trailing-curtain-sync is useful > > > either way (panning or not) trailing-curtain sync would put whatever blurs > were in the picture caused by subject motion or camera shake BEHIND the > direction of movement. You are still freezing the subject with that burst > of flash at the END of the exposure. Look at the pictures. The > headlights > are clearly in front of the frozen cars indicating that the exposure was > still going on while he panned (or didn't; I think he was > panning) but after > the flash fired. > > Quoting "Bucky": > "Forgive me for being dense . . ." > ;-) > Christian Skofteland > [EMAIL PROTECTED] > > > ----- Original Message ----- > From: <[EMAIL PROTECTED]> > To: <[EMAIL PROTECTED]> > Sent: Friday, January 02, 2004 6:37 PM > Subject: Re: OT: why trailing-curtain-sync is useful > > > > BTW, I should add that if a background were visible, and it exhibited > motion > > blur, or if there was a brightly lit foreground, we could probably tell > which > > sync was used, because the background is almost certainly moving on one > > direction as seen through the viewfinder. Because these shots are so > dark, > > there's nothing meaningful to use as a frame of reference. > > > > Quoting myself: > > > > > Forgive me for being dense . . . > > > > ------------------------------------------------- > > This mail sent through IMP: http://horde.org/imp/ > > >
