Attached Link: http://market.renderosity.com/~photo/newweb/index.htm

from the resource center, Michelle's article on Polarizing Filters :] you can also expose a photo for the sky & one for the land & combine the 2 in PS :] you probably already do this too- Bracketing: A method of ensuring that the best exposure has been made. After metering the scene and making an exposure based on that information, subsequent exposures are made to slightly increase, and decrease the amount of exposure. This is accomplished by by either adjusting the shutter speed, or the aperture opening (f-stop). The preferred method is to adjust the shutter speed, so that the Depth of Field is not affected. -from the Resource Center Dictionary