Canon Rumors has posted an interesting article by Roger Cicala from LensRentals.com, where he injects a little reason into the discussion of flaws in lenses. It’s good reading for anyone who enjoys photography and lens talk, but the gist is this: major flaws are worth complaining about, but minor flaws such as slightly uneven sharpness, tiny focus issues, and so on, are expected in such a complicated component.
Learn to love your lens and accept its flaws as idiosyncrasies! If you want a perfect lens, you’re free to drop $30,000 on a Master Prime. It’s a miracle that you can get a sub-F/2 lens for under a thousand bucks in the first place!