от:OlAf
http://www.slrgear.com/reviews/showproduct.php/product/1316/cat/11
"The full-frame 5D is even more demanding on the lens. Wide open at ƒ/2.8, the lens shows its best performance at 70mm, with a generous sweet spot of 1-1.5 blur units in the center of the frame, degrading slightly to some corner softness; around 2 blur units. From 100mm and up we note increasing corner softness and a lessening of that sharp sweet spot until it's just over 1.5 blur units in the center and 2 in the corners at 200mm."
http://www.slrgear.com/reviews/showproduct.php/product/1280/cat/13
"The lens produces exceptionally sharp images at ƒ/2.8, from 70mm through to 200mm. At this aperture its ''best'' performance comes at 70mm, with just over 1 blur unit in the center and 1.5 blur units in the corners; the center becomes marginally less sharp as the lens is zoomed in to 200mm, but whether this is noteworthy is doubtful - even at 200mm, we're seeing just 1.5 blur units across the frame. Of the lenses we've tested across all manufacturers, none have achieved this performance at ƒ/2.8."Подробнее
Canon EF 70-200mm f/2.8L IS II USM (Tested) Post a Review
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Во первых про морщины на шее я не говорил что их тоже надо редактировать - это вы сами развели демагогию. Во вторых фотограф сам должен понимать где и что редактировать. Если этого нет - надо учиться. 
;) 
