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Opticallimits > Forums > Just Talk > What is this optical phenomenon? Donut-shaped focus/blur?

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What is this optical phenomenon? Donut-shaped focus/blur?
BasilG Offline
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#25
03-11-2015, 11:28 PM
Now that's surprising. Why have all those posts been withdrawn?

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What is this optical phenomenon? Donut-shaped focus/blur? - by BasilG - 03-11-2015, 11:28 PM

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