You got it. Regards, Bob... --------------------------- "No man's life, liberty or property is safe while the legislature is in session." -- Mark Twain
From: "Steve Desjardins" <[EMAIL PROTECTED]> > Let me see if I have this straight: > > The extent of diffraction is determined by the size of the aperture but > the effect at the film plane also depends on the focal length of the > length. Because both of these are involved, the property I should worry > about in terms of effect on my pictures is f stop, which is the ratio of > these two factors.
