Focusing on the horizon in low light

A typical landscape shot is usually something like I've got here, a big grand…vista, where I want everything all the way out to the horizon in focus.…You may not be able to see the horizon right now because it's too dark for our…video cameras to pick it up.…So I'm going to take a quick picture here for you.…I've cranked my ISO up to 12,000.…I'm just going to grab a quick sloppy shot of the horizon here so you can see…more what I'm seeing with my naked eye.…My eye is not showing me an image that's quite that bright, but I can see that…horizon out there, the edge of the mountains, with my naked eye.…

If you're new to landscape photography your first impulse might be, oh, okay, I…need to just focus on the horizon, I need to focus on infinity. That's actually…not the way to do it.…You got to remember how depth of field works.…Depth of field is measured around your point of focus.…So for example, if I have 6 inches of depth of field it doesn't start at the…end of the--my depth of field does not start at the end of the lens and go out for 6 inches.…