I've been testing the 3-12 and the 5-20 swapping them back and forth between 223, and 22lr and just using the tripod to film critters.
The 5-20 has a pretty narrow fov and imo, would be better suited for day shooting. Even at 5x...its pretty tight if youre trying to locate things, and 99% of my night time engagements would be inside 100 yds.
If I were going to buy one for night time. It would be a 3-12. It was mounted to my AR, or I would have used it last night. The 5-20 was attached to my tripod.
The LRF is NOT on all the time.
It's a single press to activate it, and then another single press turns it off while it calculates and displays ballistic holds.
Here's the 3-12 and few days ago
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