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Old Jun 16, 2006, 9:55 PM   #4
Senior Member
Join Date: Feb 2005
Posts: 175

Chris, you'll really want to read this artice:

Also, I have the 100-400L, and I use it to shoot at the beach all the time. Dust is a non-issue with this lens. I'm not saying it doesn't get a little dust in it, it does. But this dust cannot be seen in the images it produces. If you don't believe me, try this: Tear a tiny corner off a piece of paper. Wet the piece, and stick it on the front of a lens. Now look through the lens (attached to a camera, of course). You probably won't even be able to see the paper!The point is, dust on or in a lens is practically irrelavent.

Hope this helps.

Chris M

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