Archived posting to the Leica Users Group, 2020/05/25
[Author Prev] [Author Next] [Thread Prev] [Thread Next] [Author Index] [Topic Index] [Home] [Search]If anyone want to actually see for themselves the differences, I would be happy to email them directly 2 files...?? But the RAW files are like 80MB each.....and I will not send out jpg files, because it is the wrong way to see the differences.... Maybe I can try to do some cropping.... let me try... Will report back.... Frank Filippone BMWRed735i at gmail.com On 5/25/2020 1:53 PM, Douglas Barry wrote: > Sample images??? > > On 25/05/2020 21:18, Frank Filippone via LUG wrote: >> If you own or have contemplated the purchase of a Sony A7 series body >> to use with your Leica M lenses, you have heard that Leica WA lenses >> show smeared corners due to the closeness of the lens to the sensor.. >> the image ray's angle causes problems. >> >> A company, KolariVision, has a modification to the A7 series that >> replaces the standard cover plate ( the one that fell OFF my M9) with >> a very thin glass cover plate ( I think it is 0.2mm thick. the Leica >> OEM plate is approx 2mm thick).? This improves the image quality in >> the corners of the frame.... So the question is, if I read all the >> literature, is any or all of it true?? Is it just marketing BS? >> >> I went testing ( yes, again). >> >> One of the most awful lenses for this problem used on the Sony A7 >> bodies that Leica has made is the 28 Summicron ASPH.? V1. >> >> One of the best lenses on the Sony bodies is the WATE... 16/18/21mm >> F4? Wide Angle TriElmar? I tried both.? I also tested a 21mm SEM, >> because I was asked to. >> >> The cameras were setup identically. The only thing that changed in >> this test was the body.( Tripod, same shutter speed, same apertures, >> same lens.... ) >> >> ::::SPOILER ALERT:::::: >> >> The Kolari modified body FAR exceeded the IQ of the unmodified body >> in the corners... >> >> A7rii vs A7rii Kolari >> >> With 21mm SEM and 28mm Summicron ( notoriously bad on Sony bodies) >> >> At ISO50 >> >> At Fwide open, F4 and F8 >> >> Distance from camera to center of image was about 15 feet. Tripod of >> course. >> >> The camera body was place at an angle, allowing for easy access to >> the corners ( the horizon line was set corner to corner) ...... >> Essentially stressing the lens corner quality as much as possible..... >> >> Focusing was done by x10 focus enlargement in MF mode in the center >> of the image......? I did not focus in the corners.... I use a ground >> glass kind of focusing, no high tech stuff.? When it LOOKS sharp it >> IS sharp. >> >> Focus was not done at each F stop... it was done wide open only. Care >> was taken to not move the focus ring when changing aperture. >> >> In the center of the frame, there was little to no difference in the >> images.? The cameras produced very similar images.... see comment >> below about the color shift..... >> >> There was NO condition where the Kolari modified body did not beat, >> by a large amount, the corner sharpness of unmodified A7rii.? NONE.? >> 21 SEM, WATE, 28 Summicron V1.... All the same result. >> >> I also added on the M240/28mm Summicron as a test vehicle against the >> Sony body.... The Kolari body BESTED the Leica body.? Not by as much >> as the Kolari bested the unmodified body, but it was pretty obvious. >> >> There is no question in my mind, that the Kolari Modified thin glass >> cover plate was a BIG improvement to the lenses tested, and I am >> willing to bet, it is a big improvement to ALL WA lenses...... >> >> Further note:? There is a color difference between the Kolari body >> and the Leica or Sony unmodified bodies.? The color shift is >> expressed as a purple tint in the Kolari modified body. Especially in >> the gray areas.... >> >> I should have shot a white card and color corrected on that..... >> maybe another day..... >> >> I am pretty anal when I do these tests.? I am careful, I look at the >> images 1:1 in comparison mode in LR.? The results are correct. >> >> If you want to up your Leica IQ game in the corners.... send a Sony >> A7 family body and $400 to Kolarivision, and get it done. It is >> cheaper than buying a M-60MP body will be..... >> >> I did not test native lenses on the modified body.? Maybe another >> day...... >> >> Paul Roark ( who found this out for himself several years ago and got >> me thinking down this path) ... want to add anything? >> >> >> PS: If you type in only Kolari to your Google search, I think you get >> a porn site.... You will figure that out pretty easily. It needs to >> be www.KolariVision.com >> > > > _______________________________________________ > Leica Users Group. > See http://leica-users.org/mailman/listinfo/lug for more information