This device is primarily a
night vision device. If you're looking for a high resolution day optic, look elsewhere. That said, they work very well during the daytime, just not state-of-the-art video. And, that's what this is, a digital video camera. It's really a binocular / monocular in that, only one of the front lenses is really a lens. The other is an IR illuminator, and a very powerful one. With zero moonlight, I can see 250 yds + at night. My primary use is night hog hunting and I find them much more comfortable to use than NV monoculars, which seriously night-blind one eye. These will still night-blind you somewhat, but with 15 brightness levels, it's not as much an issue. The zoom is a DIGITAL zoom, not optical. Hence, as you zoom in, the image degrades, just like a digital camera. Limitations: ALL digital NV devices need IR illumination or lots of moonlight to work. The built-in IR is a good one. They also won't work in fog, mist or heavy rain. That's just the nature of the beast with digital NV. The image IS somewhat "grainy", but not problematically so. The image is superior to Gen 1 or Gen 2 NV, both of which I own. As a night scanning device, these work GREAT if you refrain from using cheap batteries. Buy quality lithium batteries or quality rechargeables (like Panasonic) and you'll "rule the night." If your usual viewing distance is < 100 yds, consider the 2X version, as the field of view is wider.