Archived posting to the Leica Users Group, 1997/05/05
[Author Prev] [Author Next] [Thread Prev] [Thread Next] [Author Index] [Topic Index] [Home] [Search]At 11:21 PM 5/5/97 +0100, you wrote: >The resolving power of >>most good lenses is greater than the eye can detect without the aid of a >>microscope AND process film. I DO NOT THINK IT IS POSSIBLE to detect any >>possible TECHNICAL difference that there MIGHT be between the Nikkor and >>Leica lenses on color print emulsions. Or even current E6 films. The >>possible resolution of both exceeds the color coupler globule size and >>therefore is not easily detectible. >Definitely not true. The best photographic lenses resolve at a maximum of >about a 140 linepairs/mm (cycles/mm). But then the contrast is so low you >do not discern any detail. The best attainable definition is about >80lp/mm, which is twice as high as most optical firms aspire for at the >moment. The Summicron-M (new version) has a benchmark limit in the centre >of 125lpmm of which maybe 60 to 70 can be recorded on film. >In order to see clumps of grain you need a resolution of 125lpmm, to see >individual grains you need 1250lpmm and to see dye globules you need >12500 lpmm! >Erwin Puts > Thank you Erwin, I was always under the impression that the "ordinary" camera films could not resolve as well as the best camera lenses. I stand corrected. Jim