A comparison of these three lenses. All pixs taken on a tripod pointing at a transformer approximately 30 yards away. This was done thru a window so the IQ is not representative of the actual IQ possible. I did this because it was a cold, windy day.

Pixs were taken at both f5.6 and f8. Also, pixs taken both with the VR On and Off (only the 200-500 and 70-300 have VR).

No image processing was done. Pixs are JPEG.

Note:
-The 300 f/4 is the older version w/o the VR.
-The TC 1.4 II is also the older version.
-With the TC 1.4 on the 200-500, f8 is the largest f stop you can set.