Yes it does. Some of the first ones can be a bit sticky, not changing the framelines all the time but usually it means the have not been used for some time, turning the ring back and forth a few times will usually clear it. Tri-Elmars are wonderful lenses, having the ease of use of a zoom on a rangefinder with the optical quality of the last generation of Leica lenses. It is my no.1 lens on the M6. Not to mention that they will be exactly the right lens for the M8Dig.
Obviously they wont change framelines on a Bessa, no provision being made for that.The downside to these lenses (at least the first generation) is that the focussing is not very nice. Stiff and short throw.