Archived posting to the Leica Users Group, 2003/08/27
[Author Prev] [Author Next] [Thread Prev] [Thread Next] [Author Index] [Topic Index] [Home] [Search]> >That's very true, but isn't it possible to design a lens system in which >successive lens elements correct for the diffraction produced by the >initial small >entry aperture. That is, the scattered light rays are recombined and >refocused as though a wider aperture lens had been used? If you could do this, you'd most probably get a Nobel prize in physics as well as a gazillion dollars from Nikon, Canon, Zeiss, Minolta, NASA, and Leica. Diffraction limitations are one of the most intractable problems for camera lens design. There is a rumor that in the 1950s, an inventor in NJ actually solved diffraction limitation for lenses > 30,000mm in length, but the next day the agency-soon-to-be-named-the-NSA swooped him up and put him in the same secret facility in Arizona with the guy who invented the 500 mpg carburetor. KN - -- Karen Nakamura http://www.photoethnography.com/ClassicCameras/ - -- To unsubscribe, see http://mejac.palo-alto.ca.us/leica-users/unsub.html