Quote Originally Posted by dsphotog View Post
To vary exposure duration, would making interchangable blades with different size slits work?
Sure, but beware of one thing - the longer times you have, the greater is the danger of vibrations introduced by these falling beasts. Especially with long focal lengths lenses where one is more tempted to use these shutters.
Thanks goodness Packards are not limited to nearly horizontal camera positions only with their vibrations...