Archived posting to the Leica Users Group, 2013/11/20
[Author Prev] [Author Next] [Thread Prev] [Thread Next] [Author Index] [Topic Index] [Home] [Search]Well, lines/mm is not the only criterion. Manny years ago, I wanted to compare the 35mm Summicron to a Zeiss Tessar 40mm (to my best recollection) that was on a Yashica point & shoot. I shot a tree in winter with both. Some small branches were bare of bark and just off-white in color. I printed both 35mm shots enlarged to 8 x 10. The film was color negative. When enlarged to 8 x 10 and examined with a 20X magnifier, the Zeiss Tessar shot showed chromatic aberration on the upper side of those white branches. The Sunmmicron shot was absolution clean. I do have to admit, the aberration could not be seen on the print with the naked eye. Herbert Kanner kanner at acm.org 650-326-8204 Question authority and the authorities will question you. On Nov 19, 2013, at 10:22 AM, lrzeitlin at aol.com wrote: >> From LensTip.com > "The Zeiss Otus 1.4/55 compares very favourably with its rivals because at > the maximum relative aperture it reaches 38 lpmm. On stopping down the > situation only improves and by f/4.0 the MTFs are on a record-breaking > level of 50 lpmm. The chart below makes it easier to see that the Otus is > really far better than all its competitors. " > > In October, 1978 the magazine "Modern Photography" in a comprehensive test > of normal lenses achieved a resolution of 102 lpmm with a Leica DR > Summicron 50 mm lens using Micro-Ektachrome film. Other lenses were close > behind. Those made by Nikon, Canon, Minolta, Pentax and Olympus all > reached 100 lpmm. For those who care to look it up, the article was titled > "How Sharp Can you Get?" The experiment was critically evaluated and > appeared sound. Images of the results are presented. > > That was 35 years ago. What am I missing here? > > Larry Z > > > > _______________________________________________ > Leica Users Group. > See http://leica-users.org/mailman/listinfo/lug for more information