I picked up an old stock 105mm last year, case included. I love how it makes people look, it's a great bridge between vintage and modern lenses. How do you fee

I picked up an old stock 105mm last year, case included. I love how it makes people look, it's a great bridge between vintage and modern lenses. How do you feel abbout the DC function? I've found R settings don't really focus correctly with AF, so it's best to focus manually. Is that the case with the 135mm version too?