Archived posting to the Leica Users Group, 1998/03/20
[Author Prev] [Author Next] [Thread Prev] [Thread Next] [Author Index] [Topic Index] [Home] [Search]- ---Marc James Small <msmall@roanoke.infi.net> wrote: >>The 'Leica Glow' dates from the Prewar era, when Leitz could not afford to produce lenses optically competitive with those from Zeiss and Voigtlander. Therefore, Max Berek tweaked his designs to exaggerate the softness of the out-of-focus images to, in turn, exagerrate the sharpness of the in-focus images. The result is a final image where the in-focus image sort of 'pops out' of the picture.<< You have stated this here a time or two in the past. I can't help but wonder how he "tweaked his design to exaggerated the softness of the out-of-focus image?" Exactly how did he go about consciously doing this? Did he design for excessive coma? Astigmatism? Spherical aberration? Keeping in mind I have little knowledge of optical design, it would still seem that to attempt to implement such a design could be just as costly as implementing a more stringent design. I mean, if the out-of-focus image has to be made just so in order to make the in-focus image appear to "pop out" as you say, then doesn't it also have to be made to some specified parameter? And be reasonably exact in meeting that parameter? I love cheap tricks Best, Don _________________________________________________________ DO YOU YAHOO!? Get your free @yahoo.com address at http://mail.yahoo.com