Archived posting to the Leica Users Group, 2014/02/24
[Author Prev] [Author Next] [Thread Prev] [Thread Next] [Author Index] [Topic Index] [Home] [Search]I'd love to see how my CZ Jena 75mm Biotar f/1.5 would work on an A7. Bet it would be sublime... On Feb 24, 2014, at 2:27 PM, "Jim Laurel (gmail)" <jplaurel at gmail.com> wrote: > I was wondering how the 19mm Elmarit R would work on the A7r. I have no > doubt that on the M240 with the right lens profile selected. > > I'm guessing that the SLR wide angles will work better on the A7r than the > M mount lenses, due to the less extreme incident light angles. > > It seems that if you want the best performance out of your M wide angles, > an M9 or M240 is still the best option. > > > > On Feb 24, 2014, at 2:10 PM, Tina Manley <images at comporium.net> wrote: > >> I have the 19 Elmarit R I can try on the M240. What would be a good test >> photo? >> >> Tina >> >> >> >> >> On Mon, Feb 24, 2014 at 4:46 PM, Jim Laurel (gmail) <jplaurel at >> gmail.com>wrote: >> >>> Thank you for doing this quick test, Sonny. Looks like the CV 15mm Heliar >>> has same issue as with the M9 and M240, only much worse. The M240 with >>> the >>> lens set to the 21mm Elmarit shows far less magenta in the corners. >>> That's, >>> of course, easy to correct with CornerFix or LR Flat Field, but the more >>> worrisome thing is how soft the edges are with both lenses. I have the >>> Heliar and the Elmarit 21mm ASPH and while the Heliar does exhibit some >>> minor magenta shift on the edges, at least the edges are sharp. And of >>> course, on the M240, the Elmarit is perfect. I am surprised to see that >>> much color shift with your pre-asph Elmarit 21 on the A7, though. >>> >>> I suspect that you would not have these color shifts or edge sharpness >>> falloff with SLR lenses adapted to the A7. It would be interesting to see >>> how a 24mm or 19mm Elmarit R would perform. I have been playing with the >>> 24mm Elmarit R on the M240 with the Leica adapter and it works perfectly. >>> >>> Thanks again for taking the time to demo this... Very informative. >>> >>> --Jim >>> >>> >>> On Feb 21, 2014, at 4:28 PM, Sonny Carter <sonc.hegr at gmail.com> wrote: >>> >>>> This was a totally unscientific test, but Jim Laurel asked a question, >>> and >>>> I had the stuff to answer it, and I think it will help me in the future. >>>> >>>> The question was, Does the V/C 15mm exhibit magenta corners with the >>>> Sony >>>> A7r? Also up was the question of smearing with wides on that camera. >>>> Looks like the answer is yes on both counts, though it may not be only >>> the >>>> camera. (I haven't tested the lens for smearing on my M9.) >>>> >>>> I also held a ir-uv cut filter up to one side of the lens, and to my >>>> eye, >>>> it seemed to lessen the magenta effect. If I can find one of the >>>> correct >>>> diameter, I'll try that one again full frame. >>>> >>>> I also did the same shot with my 21 pre asph Elmarit and the Sony Zoom >>> set >>>> at 28mm. >>>> I just set the camera at auto for all 3 lenses. >>>> >>>> This test probably is not in depth enough for some of you, but it tells >>> me >>>> what I want to know, and that's to use these two lenses on my M9. Easy >>>> enough, as I barely use them anyhow. I rarely take a 35 off my camera >>> ever >>>> except for my flower shooting. >>>> >>>> Here are the snaps. >>>> >>>> http://sonc.com/look/?page_id=3324 >>>> >>>> To see full sized jpegs of the four shots, go to www.sonc.com/a7r >>>> >>>> www.sonc.com/a7r/15-big-DSC00641.jpg >>>> www.sonc.com/a7r/21bigDSC00648.jpg >>>> www.sonc.com/a7r/28zoomDSC00650.jpg >>>> www.sonc.com/a7r/filter-bigDSC00645.jpg >>>> >>>> >>>> On Fri, Feb 21, 2014 at 6:23 PM, Geoff Hopkinson <hopsternew at >>>> gmail.com >>>> wrote: >>>> >>>>> 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 >>>>>> >>>>> >>>>> _______________________________________________ >>>>> 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 >>>> >>>> _______________________________________________ >>>> 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 >>> >>> >> >> >> -- >> Tina Manley >> http:// <http://tina-manley.artistwebsites.com/>www.tinamanley.com >> >> _______________________________________________ >> Leica Users Group. >> See http://leica-users.org/mailman/listinfo/lug for more information >