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anyone using a diopter for Canon SX60?

Started Aug 18, 2018 | Questions thread
Maxx1676 New Member • Posts: 2
Re: Filter threads ?

Those are not threads. They are concentric rings (grooves) to prevent light reflection from inside the lens barrel to help control flare.

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Canon EOS 7D Canon EF-S 18-200mm f/3.5-5.6 IS
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