Stany:
I'm sending you a couple of samples, demonstrating the additional detail that the D7000 can pull from this lens combination, relative to the D3/D700.
http://www.fotografie.fr/fotosOpForum/MarianneOelund/originals/VR2TC20_D3vsD7K.jpghttp://www.fotografie.fr/fotosOpForum/MarianneOelund/originals/VR2_aloneVsTC20.jpg The test subject used in this case was a printed flyer. Cameras were used at base ISO for best detail, and lenses were used wide open. The finest detail consists of the printing dot pattern, and surface dust and fibers, so that is what you will want to compare.
In
VR2TC20_D3vsD7K.jpg, you see a D3 image on the left, which has been upsampled 176% to match the scale of the D7000 image at 100% on the right. You can see that there is detail beyond what the D3 can capture, but only very heavy cropping, or a huge print size, would reveal this difference in the final output.
In
VR2_aloneVsTC20.jpg, you see two D7000 images at 100%. On the left, the image is with the 70-200 VR II at a closer distance, with no TC; this is a detail reference. On the right is with the TC-20E III added, at a greater distance which matches the magnification. This example shows how much detail loss there is in the optics, from adding the TC.
These aren't the best examples, but they are what I have available at the moment. Let me know if you have any questions.
Sincerely,
Marianne Oelund