Here we go again!
"A hiker in Alaska’s Denali National Park photographed a grizzly bear for at least eight minutes before the bear mauled and killed him..... He was backpacking alone along the Toklat River on Friday afternoon when he came within 50 yards of the bear, far closer than the quarter-mile of separation required by park rules, officials said."
The speed of a male grizzly bear is estimated to be about 30 MPH. That means the bear can cover 50 yards in less than 4 seconds. There is no doubt about it; the best way to deal with any predator is to stay away from them — as far away as possible. If you can't avoid them, and you can't outrun them, you had best be prepared to stand your ground; that usually requires more than a camera!