Welcome to the forum,there are a lot of knowledgeable people on here to advice you about noise removal/reduction,ime rubbish at it but this is my take.
I think with that lens he may need a focus motor in camera,
Not considering one but this picture was available as a down load so i guess ime allowed to play and repost.
As downloaded
After a bit of playing
@Marcel
Taking this on board just checking the Sigma 150 macro comment is not a typo,it is a lens i like but have never done anything about it because i have the sigma 105.