Well, Shel, you are right about the direction of travel. It
needs to be up the image, down it leans back, sidewise it leans
up or down. If you hold your horizontal shutter camera for a
vertical shot you get the effect.
Speed however? The amount of distortion is governed by the
curtain speed, not the shutter speed. The old focal plane
shutter had very slow curtains the would take maybe 1/10 second
to as long as 1/4 second to move across the film. Of course you
get the same distortion with a modern focal plane shutter, but
because the curtains move so fast it is hardly noticeable.
--Tom
Shel Belinkoff wrote:
>
> Actually, it's not just the speed of the shutter, but the
> direction of travel as well that causes the tilt. If a car is
> traveling fast enough, and you use a slow enough speed on a
> vertical focal plane shutter, you'll get that effect. You won't
> get it with a horizontal shutter, however.
-
This message is from the Pentax-Discuss Mail List. To unsubscribe,
go to http://www.pdml.net and follow the directions. Don't forget to
visit the Pentax Users' Gallery at http://pug.komkon.org .
