kin2son wrote:
Guy I fully understand what you are saying, but as BastianK has shown the ZM isn't immune and field curvature free.
Also the CV is better than the ZM at center and mid frame.
Even with what you said is true, your example of filling 3 people at f4 with ZM will have the same issue (albeit less than CV maybe?). And if you have to tightly frame a 3 people group shots with faces near extreme edges then I am sorry that's just the incompetence of the photographer.
Looking at your website and regardless of how much the corners matter it will show ABSOLUTELY no difference no real life prints.
I know this forum is great at vigorous tests and measurebating, but sometimes it's way over the line I feel.
I guess I don't agree with your analysis here. If you care about real life prints any small advantage for the CV in the centre of Bastian shots certainly won't show up for real life prints and to my eye the ZM does ever so slightly better at mid frame than the CV, but again this won't show up in real prints. What will show up in real prints in the difference in the corners even at f/8, so by the real life prints criteria the ZM would have a small but probably noticeable advantage int he corners. Is it worth the extra money and carrying the larger lens? That would depend on the person.
You should also keep in mind that Bastian's test is just one and others have found the opposite pattern in the centre, but I don't think there is much disputing that centre sharpness is similar with these two lenses.
It also matter what camera you are shooting. On a digital Leica M or a Sony with a modified sensor stack the differences will be bigger. My preference for the ZM comes down to two things that aren't tested here. First the ZM has excellent performance up close even into the macro range with extension. The CV not so much. That matters to me. Second, I like the rendering of the ZM especially the high micro contrast.
None of these things are measurebating as you call it. They are aspects of the holistic image. Now these are things important to me and others might care about other things and not share my preferences. So, of course, YMMV.
Feb 08, 2017 at 12:50 AM
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