See the whole series:
http://singhray.blogspot.com/2009/03/how-to-use-your-cameras-spot-meter-to.html
How to use your camera's spot meter to quickly choose the right Graduated ND filter
See the whole series:
http://singhray.blogspot.com/2009/03/how-to-use-your-cameras-spot-meter-to.html
