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.
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.