Not well made - Vortex Crossfire HD 12x50mm Roof Prism Binoculars

This is my 2nd bino purchase for Vortex. We have have about 6 of their Scopes. This Bino was by far inferior to what I have been used to with Vortex. The focus adjustment was loose, there was lag in the adjustment. I have experienced this with a pair of Nikons before, they never go to the field and as we have used them it has become a chore to get the focus adjusted properly. I planned to take these Binos to the field so i did not like this sloppy adjustment. Secondly, the glass seems inferior, i tried these in different lighting situations and environments,, the edges were cloudy and the image itself had a mirage effect. I used them side by side with other binos we have so i could in fact compare what i saw with more than one pair of binos to verify the image that i was viewing should look like. These are going back and I'll try the next level up.