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Oil on blades – how to fix it without total disassembling

The condition of a lens for reviews and tests can be any, until it doesn’t affect image quality and testing process. ‘Oiled aperture’ is in the list of such typical issues, but visible oil or stacked blades can significantly affect the price, so, it helps to save money of tester. And that’s would be great, if defect can be repaired without big efforts.

Note: demonstrated method isn’t a silver bullet – owner still needs a number of tools, skills and time.

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