Archived posting to the Leica Users Group, 2014/02/21

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Subject: [Leica] OT - Sony Alpha 7R
From: hopsternew at gmail.com (Geoff Hopkinson)
Date: Sat, 22 Feb 2014 10:23:16 +1000
References: <CF2BB9E0.185C5%mark@rabinergroup.com> <5321466E-C881-40C2-AB08-4C66A30B3654@gmail.com> <CAFfkXxsWcCic2qhJegHpoerEnFh1ZB7zm6_47qHdVhUkn9hGww@mail.gmail.com> <2B9DDEAB-D9F4-4E7F-B0CD-663F5090D7D7@gmail.com> <3F24E644-A878-4172-AF84-EEEDBBAF40DC@gmail.com> <1F81C9A1-127D-466E-BA2E-DBD3A9E9F883@gmail.com> <FE5E005E-0ED3-405D-ABAE-20D035F8AD35@gmail.com>

Leica raah raah forum !!
On Feb 22, 2014 1:00 AM, "Steve Barbour" <steve.barbour at gmail.com> wrote:

>
> On Feb 20, 2014, at 5:46 PM, Jim Laurel (gmail) <jplaurel at gmail.com>
> wrote:
>
> > All I've seen, Steve, is some anecdotal evidence. Don't get me started
> on Ken Rockwell, but on this page, he does have some examples of a 21mm
> Super Elmar-M adapted to the A7 that appears to show sensor reflections and
> smeared corner detail. Lurking around the dpreview forums, I've seen others
> report similar results. But of course it's hard to know for sure
> >
> > http://www.kenrockwell.com/tech/comparisons/2013-12-leica-sony-canon/
>
> hi Jim, we are happy to see you back. My point of course is....we don't
> exactly have PROOF of anything, though we do have anecdotal and selected
> stories by people with an agenda. No completeness or worst case scenarios
> by unbiased individuals with data for the leica M240, as well as the Sony
> A7 and A7r. Selected stories to make a  point by people who wish to make a
> point. No semblance of a real unbiased careful comparison. All of this is
> then presented to a leica rah rah forum by people who like leica, whether
> they use one or not.. I would like to know what the real facts are, based
> on real world data, with carefully done comparisons. And if the cameras in
> question have flaws in some areas, I will use the cameras accordingly,
> always the case for all of us.
> I used a CV 12 mm lens on my A7r, with many usable results, but some
> unacceptable results as well.
> That alerted me to be careful, especially with the widest of the wide.
> Extrapolating this to all lenses under 50mm is not a conclusion based on
> the facts. Some results of the widest lenses are acceptable, and we need to
> have some reasonable ground rules. It occurred to me that we don't have
> rigorous comparative data, even for the M240. What is clear is that many!!
> lenses on the A7r, give incredibly wonderful results, it would seem far
> greater in number for the A7r than the M240 because the list includes most
> lenses ever made by most optical companies, including all of the leica R
> lenses.
>
> Looked at in this light, I feel that the least we need to do, is approach
> this question with complete  understanding of the situation, an open mind,
> and armed with some real world comparative data.
>
> By the way, the above subject line says OT, but in my estimation this
> subject is very much on topic.
>
> thanks for bringing it up,
>
> Steve
>
>
>
> > --Jim
> >
> >
> >
> > On Feb 20, 2014, at 5:10 PM, Steve Barbour <steve.barbour at gmail.com>
> wrote:
> >
> >>
> >>
> >> Sent from my iPhone
> >> Steve Barbour
> >>
> >> On Feb 20, 2014, at 4:39 PM, Jim Gmail <jplaurel at gmail.com> wrote:
> >>
> >> Aren't there a lot if reported issues with adapted lenses? The Leica M
> primes, at least, seem to perform much better on the M240 than on the A7.
> >>
> >> where is this proven?
> >>
> >
> >
> > _______________________________________________
> > Leica Users Group.
> > See http://leica-users.org/mailman/listinfo/lug for more information
>
>
> _______________________________________________
> Leica Users Group.
> See http://leica-users.org/mailman/listinfo/lug for more information
>


Replies: Reply from sonc.hegr at gmail.com (Sonny Carter) ([Leica] OT - Sony Alpha 7R)
Reply from steve.barbour at gmail.com (Steve Barbour) ([Leica] OT - Sony Alpha 7R)
In reply to: Message from mark at rabinergroup.com (Mark Rabiner) ([Leica] OT - Sony Alpha 7R)
Message from jplaurel at gmail.com (Jim Laurel (gmail)) ([Leica] OT - Sony Alpha 7R)
Message from sonc.hegr at gmail.com (Sonny Carter) ([Leica] OT - Sony Alpha 7R)
Message from jplaurel at gmail.com (Jim Gmail) ([Leica] OT - Sony Alpha 7R)
Message from steve.barbour at gmail.com (Steve Barbour) ([Leica] OT - Sony Alpha 7R)
Message from jplaurel at gmail.com (Jim Laurel (gmail)) ([Leica] OT - Sony Alpha 7R)
Message from steve.barbour at gmail.com (Steve Barbour) ([Leica] OT - Sony Alpha 7R)