Just went outside to compare thermal digital zoom to day optic zoom into the thermal display with a StingIR 640 res clip-on mounted in front of a Leupould 3-18x50mm VX-6 HD.

Both day scope and thermal are 1.640" above the rail (2.875 over bore line) and I have a 25mm reducer on the objective to limit the amount of stray light entering the scope.

Deer at 500yds are identifiable both ways but I prefer the thermal on 1X and use the zoom on the day scope. I prefer the image of thermal at 1X and scope zoomed to 9X if I was shooting.

Adjusting the digital zoom on a clip on is a pain due to the thermal being out in front of the scope and harder to reach. Finding the right button to push to zoom couldbe problematic in a hunting situation where as zooming the day optic is very simple.

The AGM StingIR does not have digital zoom in clip on mode but you can use it in scan mode to test the effect.

The StingIR is 8 ozs and really does a lot of things pretty well.

John Burns

I have all the sources.
They can't stop the signal.