The purpose of the Medium Grad is to filter the sky with minimal impact on the land. Ideal when elements like rooftops and mountains protrude into the sky, balancing out the exposure throughout the frame. A true neutral density grad should have no impact on color balance, and because LEE filters are perfectly neutral, your images will be true to what you see in nature.
The 0.6 and 0.9 grad filters are two of the most commonly used grad filters in landscape photography, and are great for shooting on bright sunny days as it will even out exposure and bring out the rich blue color of the sky! The 0.6 Graduated ND Filter will reduce the exposure in the top part of the frame by 2 f-stops, and the 0.9 Graduated ND Filter will reduce the exposure in the top part of the frame by 3 f-stops.
These filters are rectangular in shape so that you have the ability to manipulate where the grad line falls within the frame. If you wish to have more skyline than foreground simply move the filter down within the holder. Moving the filter up within the holder will allow for more foreground than skyline, you have ultimate creative control!