I'll start by shooting them first on a crop factor camera (Nikon D300s), now on a full frame camera (Nikon D810). This lens works great on both cameras with a few caveats. On a camera with a crop factor, you will need to move noticeably farther, which is natural, and the picture will be flatter than on a full-frame camera. Perhaps everything! If you have any doubts about creating a bunch of "crop + 85" or "ff + 85", don't even think about it. What is there, what is there, the lens will help to find its application, unlike 50 mm, which is on the "crop" neither here nor there, but on the full frame it is! Autofocus is slow to disgrace, but very accurate. During daylight hours, there will be no problems, but in a dark studio, where only pilot light works, you will swear a lot and for a long time! In the tracking AF mode, you don’t even have to try to use it - it’s hard to keep up with moving objects and not always. Yes, I use it at weddings. Yes, I shot basketball, volleyball and football with it, but with a lot of dissatisfaction. Definitely a great picture! If you're shooting commercially, a lens will pay for itself many times over. Portraits from a full frame look much tastier / more voluminous than from a "crop" - a fact that does not make sense to hide.
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