One more thing I know I've read and heard but bears repeating is a scanner is great with a 1.5 or 2x magnification to have a good FOV but the sight needs to be higher magnification regardless of the resolution. Every time you increase zoom, the resolution gets cut in half. Trying to ID something at 1000 yards and cutting your resolution down drives me insane.
So question, how do the clip on thermals work when you zoom your scope instead of the thermal?
It's the same sort of dilema.
With a clip on you have 2 options.
#1 Leave the day scope the same and using digital zoom of the thermal.
#2 is to zoom the day optic into the thermals display.
Both options are 2 sides of the same coin.
One major advantage of the clip on at 1x is using the dials on the day scope for hold over. If one uses the digital zoom on the thermal then that advantage goes away.
