the book "Photographic Materials and Processes" by Leslie Stroebel, John Compton, Ira Current, and Richard Zakia has an explaination of why this happens and has a table of corrections to use.
On Mon, Apr 08, 2002 at 09:23:03PM -0600, William Robb wrote: > ----- Original Message ----- > From: Shel Belinkoff > Subject: Re: RE: Leaf Shutters > > > > According to the Kodak Professional Photoguide, as well as > > numerous sources on the 'net, including mailing lists that > feature > > cameras with leaf shutters, high shutter speeds used in > conjunction > > with smaller apertures produce slower effective shutter > speeds, > > producing more exposure than the indicated shutter > speed/f-stop > > combination. This is caused, according to Kodak, "by the > geometry > > of the lens-shutter-diaphragm assembly combined with inertia > of > > moving parts, and is not a manufacturing defect." > > I have heard this as well. I did test my 90mm leaf lens shutter > against the camera shutter. I don't recall seing any glaring > differences. This might mean my 6x7 body has a slow shutter. > This would be no surprise, given the size of the thing. > I don't recall ever using a view camera shutter faster than > about 1/30th of a second. > > William Robb > - > 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 . - 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 .
