Is this Ghosting or Lens Flare?

Started Feb 27, 2013 | Discussions thread
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Nordstjernen Veteran Member • Posts: 6,876
Re: Is this Ghosting or Lens Flare?

When older lenses are used at wide aperture a blue halo around bright lights is common, since these lenses are acromatic sorrected, not apo-cromatic. Then blue light is put out of focus. When the amount of blue is reduced in the pictures, the halo is less visible. You might also stop down the lens to reduce the amount of out-of-focus blue light.

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