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By David Kilpatrick, on February 5th, 2016 
In interviews about the new micron-accurate aspheric lens element moulding process used to increase the resolution of the latest Sony G Master lenses, a visual has appeared which shows the ‘onion ring’ effect that coarser mould machining causes in lens elements.
Working independently, I’ve been aware of this for years – and I have used . . . → Read More: Sony’s precision aspherics
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