I've read thousands of lens reviews over the years and one of the returning questions is always; how good does the test subject control\suppress flaring. In most situations it's good to know that your lens don't make huge colorful spots across your image. My Rayxar on the other hand can't help it, it's flares all over sometimes. And occasionally the flares get to play the first violin.
Cheers, Erlend
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From @erlendgroseth