Still playing around with and getting to know my latest addition to my vintage lens collection, the Tair-11.
It's quite beautiful with its bare aluminum all metal barrel, I think (pic here: http://365project.org/atchoo/365/2017-12-29 ).
It was made by the Russian KMZ factory (Krasnogorsky Zavod) in Krasnogorsk near Moscow in the late 1950/early 1960 so it's been around for a long time :-).
It's taking me a little while to get to know it, but the more I use it the more I love it... The only minus I can think of so far is the weight of it - 564 grams (the lens alone) - it's rather heavy to be carrying around... It also has a little bit of a tendency to produce chromatic abberation, but in this shot of a puddle with some reflections and ripples, I actually like the effect.