What is the magnification on the resolute? How does it do with a smaller IR light like a T-20. The 67mm is sort of bulky.
I use a t20 with a doubler and a 850nm pill. Without the doubler it does lose some distance, I would say 200 yards without and close to 500 yards with. The light that comes with it is just as good if not better than my doubled t20.
The lens is a 1/3" format 100mm fl, best I can guess-ta-mate is the field of view at 300' is 15' wide. Maybe mike will chime in with the exact numbers?