[Leica] Re: Tri-elmar and Bokeh

[Jim Brick <jim_brick@agilent.com>]

Bokeh, is truly a personal and very subjective property. It does not seem
to be congruent with modern lens design. Erwin has never been a proponent
of describing Bokeh and to attempt to quantify it would be a lifetime job.
And in the end, it is all subjective to each viewer. It is not like
quantifying resolution or centering or pincushion. For Erwin (or anyone
else) to attempt to put a qualitative value on Bokeh, is not in anyone's
interest. It cannot be done.

Jim


At 02:31 PM 5/29/01 +0000, Logan Reinwood wrote:
>Hi,
>
>I was a bit disappointed with the section dealing with Bokeh in Erwin's 
>book. His comments seem a bit "simple":
>He says that the Bokeh of the latest lenses is not as good as the one of the 
>previous leica lenses. Mentionning, for instance that the 35/pre asph is the 
>king-of-bokeh. His main argument is the fact that the newest lens are more 
>sharp and thus the difference between the in and out focus is more straight. 
>I have no problem with this statment and agree. But I would say, without any 
>scientific experimentations, that this is a bit simple. I would assume that 
>the optical design should have an influence too: Users often report that the 
>zoom are not as good as the prime in terms of bokeh.
>
>What do Tri-elmar user thing of the bokeh of their lens when compared to the 
>prime lenses ?
>
>krgds,
>
>logan.