I am not much interested in writing about technique, but this time I will. But I will keep it short! Yesterday at the races I tested an interesting lens. Canon zoom f100-400, 4,5-5,6. But as I guess that you noted you couldn´t tell if it was sharp or not in those images. Well, this isn´t much better since these images are 72 dpi and small. But anyway, Hemingway… The type of image is totally different.
Todays use are all handheld with IS at no 1. Yesterday I didn´t use Image Stabilsation, IS, at all.
I just went on a small walk close to our summerhouse since I think testcharts are SO boring. Useful of course but boring. I will happily let other people photograph those.
I am not a birdwatcher but there they were. And I came so close. The camera is a EOS 1D Mk lV, so f 400 is really f 520. The close range i suberb! I like it very much and I think that if you are looking for this focal range this is a very good buy.