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Title: Best lens ever
Review: I had this lens for about a month. The image quality is just amazing. It is so sharp that I can crop almost any sizes I want and still remain good quality prints. The contrast and saturation are just perfect. I do not regret to have F4 version. It is lighter than F2.8 and $500 cheaper. F4 is just good with IS. In low light condition, I use either flash or higher ISO, making perfect pictures. Highly recommended.
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