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Originally posted by mckingtom View PostHi, I realised that most of the photos taken at max focus (Canon 100-400 L mk i & ii ) have rings around the subject, as shown below (visible only when equalising the photo). No other photo processing was done. Can someone explain why this?
Thanks!
[ATTACH=CONFIG]8037[/ATTACH]
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Originally posted by dlowwa View PostIf you're talking about that circular banding in the sky, I doubt it has anything to do with the lens, and is more likely related to processing. Try processing a RAW file with all settings to zero, and I doubt you will see it. My guess would be it's the effect of software-applied vignetting reduction (either in-camera or in post), especially if it's at the long end of the zoom range where vignetting tends to show up more.
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