Scratched ExpoDisc throw off white balance setting?
Joves wrote: No
Unless of course it is the width of a paint scraper across the center, but then the answer would be no.
The sensor is gong to receive the light (data) from the entire Disc and a scratch would constitute such a small area with the aperture open. I have heard that the white lid from A Duncan Donuts coffee cup has almost exactly an 18% grey color.
Shoot, learn and share. It will make you a better photographer.
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