[Leica] BIG new Leica
Jim Nichols
jhnichols at lighttube.net
Fri Oct 23 14:37:10 PDT 2015
Paul,
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
> http://www.paulroark.com/Loxia-v-Leica-21-f28.tif
>
> 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
> www.PaulRoark.com
>
>
>
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