I have owned a pair of Nikon Monarch ATB’s(8×42) for a couple of years now. They are really clear and I have had no problems with them. I just purchased another pair of Nikon Monarch ATB’s(10×42) for my wife. Both of us seem to think they are a little blurry. We were both disappointed and surprised because all of our Nikon optics have been excellant. I am going to exchange them for another pair. Not sure if i will stay with the 10 power or drop down to 8 power.