Parallax focus adjustment went out. - Vortex OPMOD Diamondback Tactical 6-24x50mm Rifle Scope, 30mm Tube, First Focal Plane (FFP)

I had to give this scope a one star review due to the fact that after properly mounting the scope to the rifle and heading to the range, the very first shot instantaneously caused a massive fog to come over the scope picture. I ended up having to keep adjusting the focus at 100 yards over and over as every shot would make the focus become blurry, foggy or whatever. Had to go all the way back to 10 yards, come forward to infinity, and go back to a sharp focus, fire a shot, and repeat. After about 50 shots, the 100 yard focus was “clear” set at 50 yards but would continue to degrade with repetitive shots. I gave this review a “yes“ recommendation because II have returned the scope for an exchange. I’m hoping this is just a one off as Vortex scopes have consistently been excellent in my experience. I have the same scope in gray mounted to a Bergara then I’ve had no problems with whatsoever.