Originally Posted by
Keith B
My 24-105 came with spot on an inner element. It looked like a chip or something but it was actually a spec of grease or something. If I looked closely at my pics I could notice a very slight blemish in the shots that I'd really have convince myself it was anything at all. So I left it alone until I decided to sell the lens. I wanted to be able to say the lens was perfect so I sent it back to Canon since it was less than a year old and the cleaned it out.
If I were you I'd send it in and not exchange it. When you send it back to Canon a skilled tech will calibrate the lens also. Every time I've sent a lens in for service it has come back seemingly sharper.
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