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Title: Don't buy this for your L lens!
Review: People- please, think! If you're spending over $1000 on a precision piece of optics, why would you put an cheap window pane in front of it? It sucks that filters cost a bit of money, but seriously, you need to get something that's at least multicoated, and preferably B&W or Heliopan or some other good brand. For a $200 lens, this is fine. But it breaks my heart to see this "bundled" with an $1100 L lens.
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