>I think you are seeing reflections from one optical surface to another
>because the lens elements are not coated to minimum such reflections.
>So light is bouncing around inside the lens assembly instead of passing
>thru the air-to-glass interface and getting to the sensor on the first
>pass. Readings can be affected by internal lens flare. How much...it
>depends!
I would doubt that the readings are affected much. If you look at a
white paper dot against a dark grey background, and then the dot is
doubled, then youmay have a problem. If it's from a narrow light
source, the main image could be hundreds of times as bright as the
double.

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John P Sheehy <JPS@no.komm>
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