I have the Telezenitar 135mm with me for more than a couple of years now. To me it's a sharp and fast medium telephoto lens. The only "weakness" is that it's a manual focus lens. I used the lens on my Nikon D800e (the lens is in Nikon F mount) and after a few uses it ended up in the dry box until I even put it up for sale. (It never got sold as I had reserved it for a friend who eventually didn't buy it.)
