[Leica] BIG new Leica

[Jim Nichols]

I finally got it to open in Picture Window Pro.

Thanks

Jim Nichols
Tullahoma, TN USA

On 10/23/2015 4:40 PM, John McMaster wrote:
> It seems to be an odd TIF, opens in PhotoShop but not Mac preview
>
> john
>
> -----Original Message-----
>
>
> 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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