Tair-11 133mm f/2.8 133 mm ? sound interesting, every maker issue lens in 135mm focal length this lens is different but not just from this point of view. Looks big, heavy and pretty :) and excellent performer. I suppose this lens would be a very good portrait lens.
Very well built lens, it has almost perfect aperture circle. I like this lens very much, because good looking, excellent performer and more than 50 yrs old. Rare item ,hard to find on the market if you have a chance to grab it , don't hesitate you won't be disappointed!