Archived posting to the Leica Users Group, 2015/10/23

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Subject: [Leica] BIG new Leica
From: jhnichols at (Jim Nichols)
Date: Fri, 23 Oct 2015 16:37:10 -0500
References: <>


I can't get the link to work.

Jim Nichols
Tullahoma, TN USA

On 10/23/2015 4:23 PM, Paul Roark wrote:
> Frank Dernie wrote:
>> ?...
>>   much easier to design an exceptional lens if size is not a constraint.
>> ?...
> ?Yes, everything is a whole set of compromises.  I assume Leica and Zeiss
> will both continue to make optics that also cater to those who value
> compactness.  The M line is Leica's current showcase of what it can do.  It
> may be that the Loxia line for the Sony is representative of what Zeiss can
> do for that platform.
> Since wide angle optics are the main area of my concern regarding the Sony
> line, I was curious just how much of a penalty that platform will pay.  To
> show this, I made a Tiff file with a cutout of the Leica v. Zeiss Loxia
> 21mm f/2.8 entries into this competition shown on different layers.  The
> images are adjusted to equalize size and distance from the sensor/film.
> Some might find looking at the two similar optics interesting.  Download
> the Tiff from
> As to relative sharpness, all we have are MTF curves that are not
> necessarily comparable.  If they are to be believed, the Zeiss wins by a
> hair.  My experience is that Leica is more conservative in these, and in
> the real world Leica might well win by a hair.   The main and more
> objective measure of performance that could be important is that,
> consistent with the performances we see in other wide angle lenses, the
> more retrofocus optic has less vignetting. Zeiss is claiming light falloff
> at f/2.8 that is equal to the Leica at f/8.
> Paul
> ?
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Replies: Reply from john at (John McMaster) ([Leica] BIG new Leica)
In reply to: Message from roark.paul at (Paul Roark) ([Leica] BIG new Leica)