[Leica] Zeiss 35mm f/1.4 ZM Distagon rumor

[red735i at verizon.net (Frank Filippone)]

I am surprised no one suggested the obvious. 
If you want to use Leica glass on your Sony A7, use R glass. They will not 
have the same set of problems WA M glass have
  And they cost less. A lot less. 
And you do not need to count cams


Frank Filippone
Red735i at verizon.net

On Sep 6, 2014, at 8:57 PM, Frank Dernie <frank.dernie at btinternet.com> 
wrote:

I think Leica have come up with an offset for the microlenses which is a 
reasonable compromise for the range of exit pupil-to-sensor distances for 
the majority of Leica lenses. Some have the exit pupil even too close for 
this offset and are not recommended but work, obviously, but sub-optimally. 
Sony seem to assume the use of lenses designed for SLRs where the exit pupil 
to sensor distance, even of WA lenses, is considerable. It would seem they 
have made no provision for oblique rays round the periphery, or very little. 
This will probably be OK for most SLR lenses, but can never be optimum for 
rangefinder optimised WA lenses. I don't believe it will be technically 
feasible to design a single lens which will be optimum for both Leica and 
Sony cameras.
Frank D.

> On 5 Sep, 2014, at 22:56, Paul Roark <roark.paul at gmail.com> wrote:
> 
> There is currently no M-mount 35mm that works well on the Sony a7r.  It's
> more sensitive to ray angle than the Leica M's.  The new Zeiss 35mm f/2
> "Loxia" (say what?) "Biogon" for the Sony E mount is similar to the ZM
> version, but not the same.  See
> http://www.zeiss.com/camera-lenses/en_de/camera_lenses/loxia/loxia235.html
> 
> I would expect Zeiss will coordinate the lines -- ZM and Sony E mount -- to
> some extent.
> 
> Apparently the Leica advantage in terms of the ray angle impact on image
> edge quality results, in part, from the thickness of the glass covering,
> not just (or even?) the microlenses, per se.  The Sony cover glass is much
> thicker.  (Why?)
> 
> I noticed Samsung recently had a press release on a process of theirs
> ("Isocell") that helps with edge smearing also.  It isolates the pixel
> cells from each other more effectively, they say.   See
> http://www.samsung.com/global/business/semiconductor/news-events/press-releases/detail?newsId=13041
> 
> 
> It's interesting to think of each pixel as a separate optical system and
> what is needed for rays coming into it at different angles to be equally
> and effectively guided into the cell without any impact on adjacent cells
> -- not a simple task.
> 
> It's also interesting to note that it's the cell phone market that has much
> of the action.  The latest photo to be put on my mantle is a cell phone
> print, and a very good one at that.  Those who criticize Leica for turning
> to a cell phone CMOS source should note that cell phones are also up to a
> pixel density that would translate into 100 MP for a full frame camera.  We
> have a lot more "progress" coming.
> 
> Paul
> www.PaulRoark.com
> 
> 
>> On Fri, Sep 5, 2014 at 1:55 PM, Sonny Carter <sonc.hegr at gmail.com> 
>> wrote:
>> 
>> It is supposed to be an M mount, and thus would be usable on both; with an
>> adapter on the A7r.
>> 
>> 
>>> On Fri, Sep 5, 2014 at 3:48 PM, Paul Roark <roark.paul at gmail.com> 
>>> wrote:
>>> 
>> http://leicarumors.com/2014/09/04/a-new-zeiss-distagon-351-4-zm-lens-leica-m-mount-to-be-announced-for-photokina.aspx/
>>> 
>>> 
>>> If true, this is interesting.  I hope they have designed this one to be
>>> compatible with both the Leica M and Sony a7r.  I'll be more interested
>> in
>>> putting money into an optic that can serve both bodies than just one.
>>> 
>>> Paul
>>> www.PaulRoark.com
>>> 
>>> _______________________________________________
>>> Leica Users Group.
>>> See http://leica-users.org/mailman/listinfo/lug for more information
>> 
>> 
>> 
>> --
>> Regards,
>> 
>> Sonny
>> http://sonc.com/look/
>> Natchitoches, Louisiana
>> 1714
>> Oldest Permanent Settlement in the Louisiana Purchase
>> 
>> USA
>> 
>> _______________________________________________
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> 
> _______________________________________________
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