It`s because the array doesn`t flash like a standard camera. They glow for a split second and the shutter speed is slow. That`s why homebrew cameras don`t blur. We use regular cameras and convert them to IR by changing the glass to see ultraviolet light. Then by putting IR material over the flash it becomes an IR camera. Then what you get is a quick blip instead of a glow. Plus, they have options for shutter speed.I should have stated I was looking i.r. I live in a area I don't want flashes attracting attention. I used a bushnell last year and did notice some blurring. I didn't know it was a i.r. thing.