The Grand Canyon is the most unforgiving of place to be a photographer. One could interpret that in myriad ways. I could write about the monsoon downpours that might short-circuit your camera. Or maybe we could discuss the dust, sand or heat that can also make a mess of your most expensive equipment. Then there are the ledges, cactus and rattlesnakes that seem to be around whenever you are concentrating on what's in the viewfinder. The above-mentioned are critical. Beware of all of them. But, the thing that will *really* ruin your photos (other than a plunge off the canyon's edge) is the impossible dynamic range of light.
