Adirondack Hiker wrote:
I use a Sigma 10-20 mm on a D5000 for most of my landscapes. I normally set it for 12 mm @ f/11 and focus manually for 3 feet. This gives my a depth of field of about 18 inches to infinity. Great for getting low and adding depth to the image. As a side note. do not use a circular polarizer with the lens, it will create very unnatural results.