DMGill wrote:
I photographed an event a week ago where some of my photos were with the D850 and 200-400mm f/4. Checking through the RAW images and viewing at a 1:1 crop, they are sharp, including those at 400mm. Generally, I was using a tripod, F/4.0, 1/160, @ ISO 3200. (You have to love digital and exif data. I'd never have remembered the precise exposure data.)
I haven't needed to, but have you tried fine tuning the focus?
Thank you for your comment. I will be looking into fine tuning the focus, which I haven't performed before. Cheers.