Sigma 105/macro

I had both the sigma ex 50 and 105. Both were nice lenses, but the lack of IS made them difficult to use fir hand held macro. I did use the 105 for portraits occasionally, but it’s not my forte. One thing - both lenses developed the same fault with the AF after a short time (this said both lenses were bought “lightly “ used). The issue seemed to be connected with the push/pull mechanism to switch between AF and MF. I suspect that the newer A series lenses don’t have the same issue as their build quality is much improved imho.