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How much did lens quality improve over EF mount's lifetime?

Started 9 months ago | Discussions thread
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Machinus New Member • Posts: 11
How much did lens quality improve over EF mount's lifetime?
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I can tell that newer EF lenses are sharper than older ones, along with being lighter, etc. I have read lots of other assessments that agree with that opinion, for most lenses. This sounds obvious, especially for lenses with revisions. I was wondering if this had been quantitatively compared by someone with good optical tools and access to a variety of lenses from the EF line, but I couldn't find the kind of study I am looking for.

For example, how do the most recently produced 70-200s compare to the older 200Ls, even more expensive ones? Would a new 2.8 beat an old 2 or 1.8? Or, how does the image quality of the rare 1200mm compare to a 600mm, produced 25 years later, with a 2x extender? I think it would be interesting to see how much Canon improved their lensmaking technique over decades on the same mount. Now that there are no more new EFs to test, you could make a definitive conclusion about the evolution of the entire mount.

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