Nikon 70-200 f/4 right bottom corner not sharp at 200mm for close target, should I exchange?

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linden7179
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Nikon 70-200 f/4 right bottom corner not sharp at 200mm for close target, should I exchange?
3 months ago

Happy new year everyone.

I just bought a Nikon 70-200 f/4. Comparing to my 70-300 VR, it is better except the bottom right corner @200mm when target is close. I am wondering if I should exchange it? (Not refundable).

Thanks ahead!

(All tests are on tripod, focused with live view, VR off)

This is the close distance comparison. Left is 70-200 f/4. Distance is 2 meter. Aperture f/5 for 70-200 f/4, f/5.3 for 70-300 VR.

This is the normal distance comparison. Left is 70-200 f/4. Distance is about 15 meter. Aperture f/5 for 70-200 f/4, f/5.3 for 70-300 VR. The 70-200 f/4 is better.

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Simonx
Nikon D600, Nikon 24-120 f/4, 70-300 VR, 50mm f/1.8, Tokina 12-24 f/4, Nikon 60mm f/2.8 Macro
EOS 50

 linden7179's gear list:linden7179's gear list
Canon EOS 300D Nikon D600 Tokina AT-X Pro 12-24mm f/4 (IF) DX Nikon AF-S Nikkor 24-120mm f/4G ED VR Nikon AF-S Nikkor 50mm f/1.8G +2 more
Nikon AF-S Nikkor 70-200mm f/4G ED VR Nikon D600
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