You don't. That 1912 camera probably had a total shutter operating time of more than a second, not the 1/100 or so of the PZ-1p (the only Pentax camera with a 1/8000 shutter speed). So with a modern camera the amount of tilt and/or distortion will be less than 1% of that seen in the 1912 image. That's still enough to be seen, of course; if you just point your camera towards a fast-moving car and push the shutter you'll end up photographing the top of the car perhaps 1/500 of a second before (or after) photographing the bottom of the car. You won't detect that on cars travelling at normal highway speeds, but you would be able to see it on a car on the track or drag strip.
But, of course, you don't just point the camera in a fixed direction and trip the shutter when a car is crossing the frame - if you try that you'll end up with a lot of empty frames. You photograph fast- moving objects by panning the camera with the car. Even a first try at panning will reduce the distortion to undetectable levels. The other approach is to use something other than a focal-plane shutter. Several medium-format camera systems offer one or more lenses with a leaf shutter mechanism. > Well, I'm disappointed. What's the point of having high shutter speeds like > 1/8000 sec if you get results like that? > > ----- Original Message ----- > From: keller.schaefer <[EMAIL PROTECTED]> > To: <[EMAIL PROTECTED]> > Sent: Friday, February 20, 2004 3:20 AM > Subject: AW: AF360FGZ high speed sync > > > > I have found a rather old and rather extreme example - it is by > > Jacques-Henri Lartigue and it is dated 1912! Here it is: > > > > www.mynetcologne.de/~nc-kellersv2/1069.jpg > > > > Amazing, isn't it? > > > > Sven > > > > > > -----Urspr�ngliche Nachricht----- > > Von: keller.schaefer [mailto:[EMAIL PROTECTED] > > Gesendet: Donnerstag, 19. Februar 2004 15:59 > > An: [EMAIL PROTECTED] > > Betreff: Re: AF360FGZ high speed sync > > > > > > The effect is not image blur but rather a distortion of the shapes. Most > > visible > > on old focal plane shutters with a slow travelling speed (and the > resulting > > low > > flash sync speed) but a 'narrow slot' causing a short exposure (a high > > shutter > > 'speed'). A bicycle going through the image will have egg-shaped wheels. > > I will try to find an example and post a link. > > > > Sven > > > > > > Zitat von Nenad Djurdjevic <[EMAIL PROTECTED]>: > > > > > Sven wrote: > > > "I have always been amazed by the fact that a focal plane shutter this > way > > > does > > > not capture 'a moment in time' but rather a certain duration in one > > > image..." > > > > > > If that's the way a shutter works at higher than sync speeds (ie. as a > > > moving slot) then how is it that a moving object is not smeared/blurred > > > across the frame? > > > > > ... > > > > > > > >
