what is this on the 300mm 2.8 lens?

Started 3 weeks ago | Questions thread
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aimmet New Member • Posts: 8
what is this on the 300mm 2.8 lens?

Recently just brought a canon 300mm 2.8 lens. I was told this wont affect image quality but it also said that it can get worse with age. this it the First IS version. Is it fungys, haze or jsut dust? ill past dust, but im not sure about haze and definitely not fungus

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