>>3828934Without some concrete example of what you're talking about, it's hard to answer your question. You obviously can't just increase the exposure of *any* shot indefinitely, since eventually, the photo will become too overexposed and washed out.
The likely answer to your question is that it's common practice for landscape photographers to stop down their lenses to increase depth of field. This can increase exposure time, and if not in full sun, might even require a tripod. With digital photography, it has become easier to notice that when lenses are stopped down past about f/11, optical diffraction makes the pixel-level details appear softer, and so people shy away from higher f-stop numbers more these days, but back in the film days, it was common practice to stop down lenses to f/16, f/22 or even more, so as to ensure that everything in the shot would be in focus. Even today, professional photographers understand that most photos will never be enlarged, so if it's only ever going to appear as a 3"x2" inset in a magazine, it's better to stop down to ensure that everything is in focus, rather than worrying about pixel-level softness that nobody will ever notice.
