Tamron 17-28mm soft in one corner only?

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Photographer124 Regular Member • Posts: 416
Tamron 17-28mm soft in one corner only?

I bought this lens new a few months back, haven't had much time to use it, now with the Armageddon in this world and no travel, etc.

Doing some shots around the backyard yesterday, I was amazed on how sharp and contrasty is in fact.... but I noticed the extreme lower right corner to be very very soft and blurry, compared to the other corners. Is this possible ? I mean , is this a result of lens de-centering ?

Thanks

 Photographer124's gear list:Photographer124's gear list
Sony a7R IV Sony FE 24-105mm F4 Canon EF 70-200 F4 II Tamron 17-28mm F2.8 Di III RXD Tamron 28-200mm F2.8-5.6 +3 more
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