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During some motel scenes you can see the lens pen that Prompto uses to clean his camera.

There’s even a scene you can get sometimes staying at a motel, where Prompto is actually cleaning the lens of his camera with it.

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In another scene you can find it sitting on the table near his camera.

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This seems to be just a basic lens pen. It doesn’t have two brushes (one on each end) like some do. It also doesn’t appear to have a cap.

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It even has little bristles on it.

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