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Canon 17-40 weird white dots inside front element

Started Sep 1, 2017 | Discussions thread
CameraCarl Veteran Member • Posts: 9,204
Re: Canon 17-40 weird white dots inside front element
1

I certainly would not describe a lens with these defects as being in "perfect condition." You need to make sure that these dots are not fungus which can spread to the lens elements and start to deteriorate image quality. And when you consider that you can get a good used lens from a reputable supplier such as KEH for $499 or from Canon as a refurb for $540, I would think about returning the lens.

p.s. I presume you read far enough in the disassembly guide to find that the author was not able to remove the spots once he had made all that effort.

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