Re: [Leica] exploring the limits (parts 1, 2, 3)

[Stephen Gandy <Stephen@CameraQuest.com>]

Hi Erwin,
I
In part 1 you made conclusions concerning design criteria of Leica/Nikon/Canon
in regards to resolution vs contrast, after comparing only 3 very different
lenses.  Two were modern current production Leica lenses, one was a 20 year old
discontinued design from Canon.  After reflection, do you still believe your
conclusions were warranted based upon this particular lens sample ?

In the past, you have commented on the LUG that resolution is not a good way to
judge lenses.  Yet you are now using resolution as a way of measuring the limits
of 35mm work.  Did you change your mind on the value of resolution charts ?
What advantage do resolution charts offer Leica when Leica has easy access to
MTF ?

You explain  "There is an empirical equation to find the system resolution of
lens and film resolution.",   without giving the equation.    Can you explain
the exact equation, and the background of it -- history and how well it is
accepted in the industry ?

In practical terms, for the average amateur photog who has neither the time nor
the expertise to get the best from their camera and lens (60 lpmm or better per
your test results),   should  your test system results be interpreted as a
reason they should not waste their money on higher priced precision equipment,
since they likely won't be able to tell the difference between a $2000 Leica
lens and a $50 Canon lens ?

Thank you very much for your work, and your insight.

Stephen Gandy