EXIF info is intact, so you should be able to see what shutter-speed, camera (all D300 if memory serves), ISO, and f-stop I used (mostly stopped down closer to two stops, f10/f11 but some f9 and even an f5.6 photo by mistake ;-) ).
What you can't see is how much I cropped, which did vary, but none of these are huge crops and a couple are not cropped at all.
I did sharpen and add contrast in post-processing. In my view one must be prepared to both sharpen rather heavily and add contrast in post if using the TC20E I/II, otherwise avoid the purchase. One further bit of advice with any teleconverter I recommend avoiding too heavy a crop, since the lens resolution is reduced.
To sum up; shot with discipline this combo can be very good.