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Strange Tamron 17-70mm vignetting

Started 8 months ago | Discussions thread
baobob
baobob Forum Pro • Posts: 18,248
Possible Newton's rings ???
1

What I see looks more to Newton's rings due to luminous interefrence by reflexion rather than some vignette artefact

Newton rings can appear either by transmission or by reflection.

To support even more that hypothesis, the fact that it disappears after f 4 which is in favor of some reflection

remains the fact that only Adobe ACR engine sees it and when I use my own gear I have no issue.

Any idea of possible unwanted reflection ?

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