I'm sorry if this isn't the right place for this question, but I wasn't sure where to post it.
I just purchased the Sigma 85mm ART with the USB dock and have been trying to fine-tune it tonight. This image below is a 100% crop. I'm not looking specifically if it's perfectly tuned or not but rather what is in focus - is what is in focus sharp enough or should I be expecting more/better? It just seems a little soft to me, but I have never done this type of autofocus tuning and this type of pixel-peeping. So I don't know how picky I should be here. What do you think? Is this a good copy or should I send it back for another?
For reference, the camera was on a tripod and I used the self-timer to take the pictures. This particular image was taken at 8ft.