Originally Posted by
Marty Henry
Infra red light is of a longer wavelength than the visible spectrum, through a lens it focuses at a different point hence the blurry image under ir with the torch when it was clear during the day. If the scopes daylight parallax is 100 the ir parallax will be less possibly 60 or 70. It works but you have to accept the poor image quality if you don't have parallax ajustment.
The unit is very sensitive and it's possible that a minute amount of back scatter from the stainless barrel may be occurring when the torch is in floodlight mode. Also if the scope has a big arse objective bell there could be reflection from that.
Run the unit off the scope and if there's no glare it's a mounting issue.