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Canon 17-40 weird white dots inside front element

Started Sep 1, 2017 | Discussions thread
BlueRay2 Forum Pro • Posts: 14,816
Re: Canon 17-40 weird white dots inside front element

looks like your illustrations of dismantling 1740 shows a different issue rather cleaning the front element, which goes quite deep into different elements and stages. but getting to the front element seems quite easy and effortless!

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