Archived posting to the Leica Users Group, 1999/04/19
[Author Prev] [Author Next] [Thread Prev] [Thread Next] [Author Index] [Topic Index] [Home] [Search]In a message dated 4/19/99 12:05:46 AM Central Daylight Time, nathan.wajsman@euronet.be writes: << Nathan Wajsman >> The move from placing greatest emphasis on resolution to placing more emphasis on contrast and reducing resolution to achieve that goal was pointed out in some of the Leica literature in the early 60's when Leica began to market the lower resolution 50 mm Summicrons. The brochures actually illustrated this with side-by-side comparisons showing that the eye perceived high contrast but lower resolution as the sharpest image. It would be very nice if Mr. Puts would undertake to compare the resolution of the old D-R Summicron with the present day Summicron. The ones I have tested show the D-R Summicron sporting a center resolution of 112-120 lpm to about 80-88 lpm for the current Summicron lenses. Further, the studies I have seen from the laboratory of Mr. Puts are conducted using color film rather than Tech Pan or a microfilm. If the current Summicrons really outperformed the D-R for resolution, I would have one on my M cameras but there have been no "figures" published, at least that I could find, that show the current Summicrons will resolve even 100 lpm. Maybe this discussion will result in such figures being located or determined or at least generate some discussion. Should you have some "figures" rather than subjective comments from various testing organizations, I would very much like to see them.