In challenging lighting situations, try using bracketing to ensure the best exposure. Usually, this means making three or more images: one slightly underexposed, one with the presumed correct exposure, and one slightly overexposed. Most DSLRs have an automatic setting to do this, but if your camera does not, you can bracket manually by slightly adjusting your exposure for each shot — usually in 1/3 -or 1/2-stop increments above and below the camera's reading. When it comes time to edit your images, you'll have more options from which to choose.