[Leica] Zeiss Otus - Lens sharpness confusion

[alal at poly.edu (Akhil Lal)]

complete different test protocol. Cannot be compared.

On Tue, 19 Nov 2013 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
>