Re: EOS 70-200 f2.8 IS - Where is everyone?

[GreenScreen]

I've got one. (at least concerning that write-up... if it's accurate)  

What are the benefits of "circular aperture blades"? 
And what exactly does "attractive defocusing" mean? (other than lens flare
looking like a circle, rather than the usual octagon)  If the background
is blurred out, will the edges be... smoother?...or what exactly.

Thanks,
Green



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