It's full frame 180 degrees. At least that's the specs. You never really know with a Soviet lens until you hold it -) The price is low enough that if I use it once a year it won't break my heart. Only real problem from my point of view is the goofy filter size. I guess I'll get real good at cutting up gel filters to fit the back.
Huram which camera? The Kievs aren't that much more money then that adapter. Somebody I think makes a less then full frame one for 35mm cameras to.