Sightmark 7x tactical magnifier - Sightmark 7x Tactical Magnifier

Disappointment with this magnifier. Causes a blur of the red dot on the SightMark Holographic sights. Had my eyes checked and they are all good. Had a gun enthusiast look at the magnifier and he couldn't make the problem go away. Looking through the holographic sight on its own, the red dot is perfect with minimal parallax. Looking through the magnifier on its own works fine as well. Put them together and hey presto...might as well use iron sights. I will buy a cheap magnifier from China and see if that makes a difference.