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Pi said:Loren E said:[...] the current L lens is a pretty old design [...]
The 17 year "pretty old design" is the reason why this lens is so good. With the current trend, I am afraid that the new one will be made for chart shooters and will screw the bokeh.
Not that there is no room for improvement - better coating and IS would be welcome but I am afraid that the IS may pose design restrictions which would change the character of this lens.
What a bizarre thing to say. I can't think of any of the newer mkII lenses which have worse out of focus rendering than the mk I versions. 24mm f1.4L mkII comes to mind. All of the big white tele zooms. The 70-200 f2.8 II LIS is another example, in fact it's only slightly better than the mk I.
The 135mm f2.0 L's bokeh is pretty bad when stopped down due to uneven or non-rounded aperture blades. Drop to f2.8 or f4 and see the Bokeh shape....pretty mis-shapen
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