I have strange suspicion that my 70-300mm lens needs fine tuning. The focus point is straight on the eyes, and yet the eyes are soft. Things to do on my vacation.
That's exactly what I was thinking of doing .You've probably seen this in the thread on the subject but I plan on trying out this dot tune method. https://www.youtube.com/watch?v=7zE50jCUPhM
I really need a 300mm f/4 with a 1.4TC