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Alamas, Thanks for the setup and comparison. I know how it is time involving for this kind of test. Since this is an almost extension of our discuss about short-tele lens (80lux vs other 85mm) in different format I feel obligated to have my comments about it. Here are few of my thoughts.
1. The test can certainly tell me sharpness of each lens (of your copy) at this distance.
2. The test can tell me one scenario of rendering at this subject distance and background distance, and ratio between. I have to also add under this lighting condition and background condition.
As your description indicated, the difference is in nuances than differences under this condition. (But if look carefully, it still can be seen that Leica has slightly less contrast than Zeiss (soft rendering) but also less CA. that is match my personal experience.)
The lens difference is small and lens character can only be found by using it under all condition such as aperture, lighting, subject, distance of subject, and ratio between subject and background. Over extensive usage, the difference can be magnified under right condition. For example, if you put same test with tree with lots of small leafs in back-lit at different subject and background ratio, you will find the difference getting bigger.
As human being, there is no way we donít inject our personal feeling into each lens, the subtle difference may not be the thing for others, but may means big to you. We also have different priority in terms of lens performance, rendering. I personally no longer care a dime about sharpness as long as it meets my not so high threshold at 1.4 and as long as it can be sharp once stop down for the case I need it sharp. If there is a universal standard for 85mm lens, then, we may end up have 85mm 1.2L in everyoneís bag.
80lux become my favorite short tele lens, quickly. it fit my need, from MFD 'glow' to slow down performance. From handling, build....
I like Leica's handling, build and optics and having big problem about their keeping rising price, simply rude and ignorant. and I don't blindly love Leica's lens, for example, I never truly love 50lux ASPH, I never echo 35cron 8 elements's rave even though I use it a lot for its handling and size and sharpness slow down. Just because I feel 35cron V4, ASPH all overpriced for a f2 lens and have no better rendering than this V1 which I paid about $1200, not low but worth it for its overall lovely handling.
I never feel exciting viewing MP100 and 90APO images as well as 200 f2 canikon images. But that is just me, and I have no problem understand why people love theirs.