There's an old saying something to the effect of "if you mind the pennies, the dollars will take care of themselves". Well so it is with photography. If you mind the basics, exposure, focus, ss, etc, the image quality will take care of itself.
NIKON D7100, AF-S 80-400 VR
f/5.6 @ 310 mm, 1/1000, ISO 500
Full vertical crop out of an original horizontal format.
Tighter crop
And full resolution. This crop is about one percent of the original pixels.
Just trying to make the point that if you start with good technical execution, you have a lot to work with. I shot this a while back while testing out the new 80-400VR.
But this reminds me how good the IQ was from the D7100 that I just busted