I own an A7R2 (full frame 42MP) and when I set the appropriate filter on the Tamron site then this lens also appears with the note "Use the lens by adjusting the image area of the camera."
Does anyone have experience of using this lens on a full frame Sony? How is the sharpness?

Question

I own an A7R2 (full frame 42MP) and when I set the appropriate filter on the Tamron site then this lens also appears with the note "Use the lens by adjusting the image area of the camera."
Does anyone have experience of using this lens on a full frame Sony? How is the sharpness?

Answer

this is an APS-C lens, i.e. on the A7R2 you still have approx. 18MP as you cannot use the whole sensor. if you do want to do this to yourself (I would advise against it), here are 2 tests, although they are more technical in nature:
https://www.dxomark.com/Lenses/Tamron/Tamron-18-200mm-F35-63-Di-III-VC-Sony-E-mounted-on-Sony-A6000__942
https://www.ephotozine.com/article/tamron-18-200mm-f-3-5-6-3-di-iii-vc-nex-lens-review-18526
and by dustin abott, not quite so technical, more related to photography:
https://dustinabbott.net/2014/10/tamron-18-200mm-vc-review/

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Question about Tamron 18-200mm f/3.5-6.3 Di III VC, Sony E

I own an A7R2 (full frame 42MP) and when I set the appropriate filter on the Tamron site then this lens also appears with the note "Use the lens by adjusting the image area of the camera." Does anyone have experience of using this lens on a full frame Sony? How is the sharpness?