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| p.4 #10 · Zeiss 135mm f/2 Apo Sonnar vs Canon EF 135mm f/2L |
Except every CA correction causes edges to loose crispness. Not mentioning fringe correction which does nice grey outlines mostly (or another contrast lost at best).
Thats why ppl buy Leica lens. And thats part of "magic" - perfect CA correction. You can shop it, but it doesnt look same. Zeiss to certain degree is similar to Leica in this. And since Leica doesnt make R anymore, its pretty much only option.
Vignetting correction is something I dont ever bother with. Distortion isnt good thing, cause with even slightest "fix" you need to have most of photo (usually all) recalculated and pretty much re-rendered. Its not always apparent, but you might loose some sharpness.
Certain lens are better simply because they are better. You cant shop Canon to look like Zeiss. Its simply not there. You may with careful post-processing improve its look and "fix" some problems, but thats all. It wont be same level. And you can do same with Zeiss. Which really doesnt make that gap smaller, rather opposite.
If it wasnt that case, Leica could stop making their highly CA corrected lens, cause anyone could PP their lens to look like Leica one. But curiously enough, even when we have much better CA correcting softer, its not happening. One might wonder why..