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The lens correction profile for the Sigma 24-70mm overcorrects the vignette at the wider end, it's not as offending in daylight scenarios but in studio or darker lit settings I'll find the corners overcorrected by about a half a stop.
Is there any way I can change or fix this Profile myself?
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You can't change the profile, but you can change the vignetting slider and then save this as the new lens default.
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I see, that's a part-fix.
But it only overcompensates at the wide end, so I'll end up having to just do the same work at a different place.
Is there anywhere I can report this, apart from here?
I've resorted now to not using profile correction when shooting on the wide end, but it does put a wrench in the works.
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I downloaded some sample ARW files shot with this lens from the below website and the 24mm vignetting correction looks good. If anything the extreme corners appear slightly under-corrected. If you can upload an ARW file that exhibits the issue to a file sharing site I'll take a look at it.
https://www.dpreview.com/samples/2698334887/sample-gallery-sigma-24-70mm-f2-8-dg-dn-for-sony-e-mount
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RAW isn't supported here, so here's a photo with and without the corrections. Would you be fine with an iCloud link or dropbox?
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Dropbox is good. Thank you.
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https://drive.google.com/drive/folders/18w1I6hMQnsDbLsas2R9FOqtZqD8qqEjl?usp=sharing
No dropbox, I'm afraid. But here's a Drive link! 🙂
Thanks!
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There's no access privelages.
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My mistake!
https://drive.google.com/drive/folders/18w1I6hMQnsDbLsas2R9FOqtZqD8qqEjl?usp=sharing
Thanks again for taking a look!
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In the ARW file you provided the Lens Profile Vignetting appears over-corrected. The below ARW file shot at the same 24mm focal length and F4 aperture with the same Sony ILCE-7M3 camera exhibits the issue in the lower-left corner.
I suggest creatitng a report of this issue at the Photoshop family feedback forum. Include a link to the report back here. Thank you.
https://feedback.photoshop.com/
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Thanks for having a look at it, but in particular providing me with the right avenue of response.
Hopefully they'll do something about it.