But it is not the 1st one (BW portrait) that is shot with 135/3.5 wide open? …...it looks a bit too sharp…...the middle one looks more like the 135/3.5 wide open?
But nice pictures anyway…….
The AI/AIS 135/3.5 is sharp wide open. The trick is to focus it accurately.
On the BW portrait, I can't see any signs of polygonal blurs in the background, they look nicely rounded (it is hard to tell though), which suggests the lens was wide open. My guess is this one was shot with the 105/2.5 anyway, due to the soft way the background is rendered.
On the middle one, the middle person (shoulder) is sharp, the other two look a little soft because they are in front or behind the focus plane (DoF too small). My guess is this was shot with the 135/3.5 as the background bokeh is not as smooth as the 105/2.5.
I'd say the last was shot with the 85/1.8 as the field of view looks wider.